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Mesozoic Evidence Trail

A Grade 6 science and literacy sequence exploring Mesozoic Era informational texts while building progressive scientific argumentation and CER writing skills.

HLHelen Love

Triassic Dawn

A Grade 6 cross-curricular science and literacy lesson where students analyze informational text on the Triassic Period and craft an evidence-based CER response with an explicit focus on robust reasoning.

Jurassic Giants

A Grade 6 literacy and science lesson where students evaluate competing pieces of textual evidence about the lush Jurassic environment to select and embed the strongest proof for a claim.

Mesozoic Evidence Trail

A Grade 6 science and literacy sequence exploring Mesozoic Era informational texts while building progressive scientific argumentation and CER writing skills.

HLHelen Love

Triassic CER Student Packet

Lesson 4 • Building a CER

The Triassic: Dawn of the Dinosaurs

Name:

Date: Period:

Guiding Question: How does reasoning connect evidence to a claim?

TEKS 6.5F-H • 6.6C-D • 6.8D

Part 1: Word Study & Academic Vocabulary

Cognate Support

Triassic Esp: Triásico

The time period when the first true dinosaurs appeared.

Claim Esp: Afirmación

A clear statement that answers a question or prompt.

Support / Evidence Esp: Evidencia

Facts and details from the text that hold up your claim.

Reasoning Esp: Razonamiento

The explanation of why your evidence proves your claim.

Part 2: Close Reading with Paragraph Focus Clues

Read paragraph by paragraph • Check off margin clues

Focus Clue: What was Earth like when dinosaurs began?

¶ 1. One Giant Landmass. About 250 million years ago, Earth was very different. All the continents were pushed together into one giant landmass called Pangaea. The land was hot and very dry. Most earlier animals had died in a major disaster. In this harsh, empty world, a new time period began: the Triassic Period. This was the birth of the dinosaurs.

Focus Clue: What physical trait made dinosaurs faster?

¶ 2. The First Dinosaurs. About 230 million years ago, the first true dinosaurs appeared. Early dinosaurs like Coelophysis were not giants. They were small, fast runners about the size of a dog. Other reptiles had legs that stuck out to the side like lizards. Dinosaurs were different: they had upright legs tucked straight under their bodies. This body shape helped them run faster, breathe while running, and save energy.

Focus Clue: What event eliminated their competitors?

¶ 3. Surviving and Growing. At first, dinosaurs shared the land with bigger reptiles. But near the end of the Triassic Period, huge volcanoes erupted and caused a mass extinction. Most other large reptiles died out. The small dinosaurs survived because they were fast and used less energy. Once their competitors were gone, dinosaurs were able to take over the Earth for millions of years.

Chunked Tasks

[Box] the supercontinent in ¶ 1.
[Underline] the leg trait in ¶ 2.
[★ Star] the disaster in ¶ 3.

Partner Clue

"Upright legs = running fast + breathing at the same time!"

Stop & Jot: (Use this stem: "Early dinosaurs had legs that...")

Grade 6 Science & Literacy • CER Unit Page 1 of 3

Lesson 4 • Anatomy of an Argument

Connecting Evidence with Reasoning

Skill: CER Mastery

Part 3: Analyze the Model CER Response

Claim [Evidence] (Reasoning)

[Claim] The upright legs of Triassic dinosaurs gave them a major survival advantage over other reptiles. [Evidence] According to the text, early dinosaurs had upright legs tucked straight under their bodies instead of sticking out like lizards. (Reasoning) This shows that dinosaurs could run faster and breathe at the same time. This matters because it allowed them to chase food and save energy, helping them survive in a harsh environment while other animals struggled.

Part 4: The Reasoning Clinic — Weak vs. Strong

Formula: What it shows + Why it helped

Weak: The Copycat

"This shows that their legs were under their bodies and they ran on two feet instead of sprawling like lizards."

Why it fails: Just repeats the quote words. Does not explain why this was helpful!

Strong: The Connector

"This matters because legs under their bodies saved energy and let them breathe while running to outlast other predators."

Why it works: Connects the body trait to real survival impact (saving energy, outlasting rivals).

Reasoning Rule: "To avoid being a copycat, I must explain how the trait helped them survive."

Part 5: Grammar Connection — Transition Starters & Mini-Practice

Starters to Introduce Evidence

• According to paragraph 2, early dinosaurs had...
• For example, the author explains that ...
• As stated in the text, ...

Starters to Introduce Reasoning

• This shows that [explain meaning/function]...
• This matters because [explain survival result]...
• Consequently, dinosaurs were able to ...

Try It Together: Fill in the blanks with your partner:

This shows that having upright legs made dinosaurs . This matters because they could escape .

Grade 6 Science & Literacy • CER Unit Page 2 of 3

Lesson 4 • Assessment Task

Guided CER Assessment

Writing Focus: Strong Reasoning

Assessment Prompt

Why was the Triassic Period important in dinosaur history?

Pre-Writing Flowchart & Sentence Menu (Follow the Path) Select 1 Claim + 1 Evidence + 2 Reasoning

1. Choose Claim

C1: "The Triassic Period was important because dinosaurs evolved traits to survive."

C2: "During the Triassic, dinosaurs gained a major survival advantage by..."

2. Choose Evidence

E1: "According to paragraph 2, dinosaurs had upright legs tucked straight under their bodies."

E2: "For example, in paragraph 3, volcanoes caused an extinction and small dinosaurs survived."

3. Pair 2 Reasoning

R1 (Explain): "This shows that having [trait] allowed dinosaurs to..."

R2 (Impact): "This matters because without it, dinosaurs could not..."

Reasoning Word Bank: sprinted • saved energy • breathed while running • outlasted rivals • survived disaster • took over

Write Your Complete CER Paragraph 4 sentences: Claim + Evidence + Reasoning 1 + Reasoning 2

Step 5: Checklist

Claim gives direct answer Evidence uses "According to..." Reasoning uses "This shows..." + "This matters..."

Grade 6 Science & Literacy • CER Unit Page 3 of 3

Triassic CER Teacher Guide

Educator Instructional Guide

Lesson 4: The Triassic — Building a CER

Grade 6 Science & Literacy

Pacing: 1 Class Period (50–60 min)

Stated Objective:

SWBAT construct a CER response and explain how textual evidence supports a claim.

Guiding Question:

How does reasoning connect evidence to a claim?

Target Standards: TEKS 6.5F-H (Comprehension & Response) TEKS 6.6C-D (Text Evidence) TEKS 6.8Dii-iii (Argument Transitions)

CCSS aligned: RI.6.1, W.6.1, W.6.2.c

Instructional Scaffolding Architecture

This lesson incorporates multi-tiered scaffolds: Spanish cognate bridges, paragraph focus clues, transition mini-drills, and a 4-step pre-writing flowchart with an academic reasoning word bank. These supports eliminate cognitive overload, allowing all students—including MLs and striving writers—to construct robust reasoning.

Academic Vocabulary & Cognate Bridges

Triassic Esp: Triásico

The first period of the Mesozoic when the earliest small dinosaurs evolved.

Claim Esp: Afirmación

A clear answer taking a definite stance answering the prompt.

Support / Evidence Esp: Evidencia

Verifiable facts from the text that physically hold up the claim.

Reasoning Esp: Razonamiento

Explains how and why the anatomical trait gave dinosaurs a survival edge.

50-Minute Lesson Pacing & Scaffold Moves

8 Min

Phase 1: Vocabulary, Cognates & Guiding Question Hook

Launch with the guiding question. Choral read the 4 vocabulary terms and point out Spanish cognates (Triásico, Afirmación, Evidencia, Razonamiento).

10 Min

Phase 2: Paragraph Focus Clues & Guided Annotations

Read aloud with students using the Paragraph Focus Clues on Page 1. Students check off the 3 margin tasks (boxing Pangaea, underlining upright legs, starring the disaster). Complete Stop & Jot using the sentence stem.

14 Min

Phase 3: CER Color-Coding, Reasoning Clinic & Mini-Drill

Examine Page 2: Color-code the model (Red/Claim, Green/Evidence, Blue/Reasoning). Compare the Weak vs. Strong reasoning cards. Complete the Part 5 transition mini-practice drill as a class or in pairs.

18 Min

Phase 4 & 5: Pre-Writing Flowchart, Word Bank & Drafting

On Page 3, walk students through the Pre-Writing Flowchart: 1. Claim, 2. Evidence, 3. Reasoning 1 + 2. Encourage using words from the Reasoning Word Bank (). Run Step 5 checklist.

Triassic CER Answer Key

Educator Reference • Answer Key

Lesson 4: Model Annotations & Answers

Aligned to Simplified Text

Part 1: Academic Vocabulary Key

Triassic

Key takeaway: The time period ~250–200 million years ago when the first true dinosaurs appeared.

Claim

Key takeaway: Direct answer to the prompt; must state a clear argument that requires proof.

Support / Evidence

Key takeaway: Direct facts and details from the text that prove the claim.

Reasoning

Key takeaway: Answers "So what?" by explaining how and why the fact helped dinosaurs survive.

Part 2: Annotated Passage Key (Simplified Text)

¶ 1. About 250 million years ago, Earth was very different. All the continents were pushed together into one giant landmass called [Pangaea] (Task 1: Boxed). The land was hot and very dry. Most earlier animals had died in a major disaster. In this harsh, empty world, a new time period began: the Triassic Period. This was the birth of the dinosaurs.

¶ 2. About 230 million years ago, the first true dinosaurs appeared. Early dinosaurs like Coelophysis were not giants. They were small, fast runners about the size of a dog. Other reptiles had legs that stuck out to the side like lizards. Dinosaurs were different: they had upright legs tucked straight under their bodies (Task 2: Underlined). This body shape helped them run faster, breathe while running, and save energy.

¶ 3. At first, dinosaurs shared the land with bigger reptiles. But near the end of the Triassic Period, huge volcanoes erupted and caused a mass extinction. ★ Most other large reptiles died out. The small dinosaurs survived because they were fast and used less energy ★ (Task 3: Starred). Once their competitors were gone, dinosaurs were able to take over the Earth for millions of years.

Exemplar Stop & Jot Response:

"Early dinosaurs had legs tucked straight under their bodies so they could stand and run upright, while other reptiles had legs sticking out to the side like lizards."

Part 3: Model Decomposition & Coding Breakdown

Claim:

"The upright legs of Triassic dinosaurs gave them a major survival advantage over other reptiles."

Teacher note: Simple, direct sentence stating the clear claim.

Evidence:

"According to the text, early dinosaurs had upright legs tucked straight under their bodies instead of sticking out like lizards."

Triassic Reasoning Slides

Lesson 4 • Scientific Argumentation

Grade 6 Science & Literacy

The Triassic: Building a CER

Guiding Question: How does reasoning connect evidence to a claim?

Focus: Writing Robust Reasoning with Transitions TEKS 6.5F-H • 6.8D

Academic Vocabulary & Word Study

Day 4 Word Bank

Triassic Esp: Triásico

The first geological period when the very first dinosaurs appeared on Earth.

Claim Esp: Afirmación

A clear statement that directly answers the guiding scientific prompt.

Support / Evidence Esp: Evidencia

Facts, details, or direct quotes from the text that back up your claim.

Reasoning Esp: Razonamiento

The explanation of how and why the evidence proves the claim.

Look at Page 1 of your student packet Turn & Talk with your partner

Active Reading: 3 Focus Clues

3 Checkpoints

Paragraph 1

One Giant Landmass

All continents joined into one hot supercontinent called Pangaea.

Task: [BOX] "Pangaea"

Paragraph 2

Upright Legs

Dinosaurs had legs straight under bodies to run fast while breathing.

Task: [UNDERLINE] Leg Trait

Paragraph 3

Surviving Disaster

Volcanoes wiped out rivals, but agile dinosaurs survived and flourished.

Task: [★ STAR] Disaster Fact

Check off your margin boxes as you read on Page 1!

Color-Coding the CER Model

● Claim ● Evidence ● Reasoning

Claim (Red)

The upright legs of Triassic dinosaurs gave them a major survival advantage over other reptiles.

Evidence (Green)

According to the text, early dinosaurs had upright legs tucked straight under their bodies instead of sticking out like lizards.

Reasoning (Blue)

This shows that dinosaurs could run faster and breathe at the same time. This matters because it helped them catch food and save energy, helping them survive in the harsh desert.

Reasoning explains why the leg shape helped them survive, rather than just repeating the fact!

The Reasoning Clinic: Avoid the Copycat!

Don't Just Repeat Your Evidence

Weak: The Copycat

"This shows that their legs were under their bodies and they ran on two feet instead of sprawling like lizards."

Jurassic Evidence Student Packet

Lesson 5 • Evaluating Evidence

The Jurassic: Choosing the Strongest Evidence

Name:

Date: Period:

Guiding Question: How do readers choose the strongest evidence when several details seem useful?

TEKS 6.5G-H • 6.6C-D • 6.8D

Part 1: Word Study & Academic Vocabulary

Cognate Support

Jurassic Esp: Jurásico

Mesozoic period when huge plant-eaters flourished in wet forests.

Environment Esp: Ambiente / Clima

The surrounding world: temperature, rain, plants, and terrain.

Thrive Esp: Prosperar

To grow massive, reproduce, and succeed in an ecosystem.

Evidence Esp: Evidencia

Direct, concrete proof from the text that proves a claim.

Part 2: Close Reading with Paragraph Focus Clues

Read paragraph by paragraph • Check off margin clues

Focus Clue: How did rain turn deserts into lush forests?

¶ 1. A Greener, Wetter Earth. During the Jurassic Period (201 to 145 million years ago), Earth underwent a massive climate transformation. The giant supercontinent Pangaea began breaking apart into smaller continents. Warm ocean waters flowed between the splitting landmasses, bringing gentle moisture and regular rainfall inland. The dry, dusty deserts of the Triassic gave way to lush, green tropical forests filled with giant ferns, mosses, and tall conifer trees.

Focus Clue: What body trait let sauropods reach endless food?

¶ 2. Giant Plant-Eaters Thrive. With rain falling regularly, plant life exploded everywhere. This endless food supply allowed plant-eating dinosaurs to evolve into the largest land animals ever known. Enormous sauropods like Brachiosaurus and Diplodocus grew up to 80 feet long and weighed more than ten elephants. Their long necks allowed them to reach tender leaves high in the forest canopy that other animals could not touch. Plated dinosaurs like Stegosaurus grazed on bushes near the ground.

Focus Clue: What predators and small creatures shared the forest?

¶ 3. Predators, Early Birds, and Small Life. The thriving plant-eaters supported other life forms. Fierce carnivores like Allosaurus hunted the massive herbivores with sharp claws and strong jaws. In the skies, flying reptiles and the very first feathered birds like Archaeopteryx glided between branches. Tiny, furry mammals scurried along the forest floor at night. The warm Jurassic climate created a rich, bustling ecosystem dominated by dinosaurs.

Strategic Pauses

[Box] two ways the climate changed.

Jurassic Evidence Teacher Guide

Educator Instructional Guide

Lesson 5: The Jurassic — Choosing the Strongest Evidence

Grade 6 Science & Literacy

Pacing: 1 Class Period (50–60 min)

Stated Objective:

SWBAT evaluate possible evidence and select the detail that most directly supports a claim.

Guiding Question:

How do readers choose the strongest evidence when several details seem useful?

Target Standards: TEKS 6.5G-H (Evaluate & Synthesize) TEKS 6.6C-D (Text Evidence Strength) TEKS 6.8Dii-iii (Sentence Embedding)

CCSS aligned: RI.6.1, RI.6.8, W.6.1

Instructional Scaffolding Architecture

To help students discern between "interesting facts" and "airtight proof," Lesson 5 provides a 3-Question Elimination Checklist (Climate? Herbivores? Cause/Effect?), sentence-level signal phrase mini-drills, and a 4-step pre-writing flowchart with an academic reasoning word bank.

Academic Vocabulary & Cognate Bridges

Jurassic Esp: Jurásico

The age of flourishing green ecosystems and giant sauropods following the Triassic.

Environment Esp: Ambiente

The living conditions: rainfall, moisture, temperature, and vegetation.

Thrive Esp: Prosperar

To flourish, grow massive, and dominate an ecological community.

Evidence Esp: Evidencia

The concrete facts that make an author's claim indisputable.

50-Minute Lesson Pacing & Scaffold Moves

8 Min

Phase 1: Vocabulary, Cognates & Guiding Question Hook

Display the guiding question. Connect cognates (Jurásico, Ambiente, Prosperar, Evidencia). Introduce the "Laser Beam" concept: finding proof that points with 100% direct accuracy at the claim.

12 Min

Phase 2: Close Read with Focus Clues & Strategic Pauses

Students read independently using the 3 Paragraph Focus Clues on Page 1. Complete the 3 pause tasks: box climate shifts (¶1), underline long neck feeding (¶2), and star forest animals (¶3). Complete Stop & Jot using the stem.

12 Min

Phase 3: The 3-Question Elimination Checklist & Ranking

On Page 2, guide students through the 3-Question Test (Climate? Herbivores? Cause/Effect?). Show how Candidates A and B fail early, while Candidate D is the only detail passing all 3 tests.

18 Min

Phase 4 & 5: Flowchart Drafting, Word Bank & Peer Check

Direct students to Page 3: follow the Pre-Writing Flowchart, integrate Candidate D with a signal phrase, and compose two reasoning sentences using the . Final 5 minutes: execute the 3-step Peer Check protocol.

Jurassic Evidence Answer Key

Educator Reference • Answer Key

Lesson 5: Evidence Evaluation Key

Official Key

Part 1: Academic Vocabulary Key

Jurassic

Takeaway: Geological period (201–145 Ma) known for lush forests and giant sauropods.

Environment

Takeaway: Living conditions: moisture, rainfall, plant life, and temperature.

Thrive

Takeaway: Growing massive, flourishing, and achieving dominant ecosystem success.

Evidence

Takeaway: The single most direct, airtight detail from text proving the claim.

Part 2: Annotated Passage & Pause Key

¶ 1. During the Jurassic Period (201 to 145 million years ago), Earth underwent a massive climate transformation. The giant supercontinent Pangaea began breaking apart into smaller continents. Warm ocean waters flowed between the splitting landmasses, [bringing gentle moisture and regular rainfall inland. The dry, dusty deserts of the Triassic gave way to lush, green tropical forests filled with giant ferns, mosses, and tall conifer trees] (Pause 1: Boxed climate shifts).

¶ 2. With rain falling regularly, plant life exploded everywhere. This endless food supply allowed plant-eating dinosaurs to evolve into the largest land animals ever known. Enormous sauropods like Brachiosaurus and Diplodocus grew up to 80 feet long and weighed more than ten elephants. Their long necks allowed them to reach tender leaves high in the forest canopy that other animals could not touch (Pause 2: Underlined feeding adaptation). Plated dinosaurs like Stegosaurus grazed on bushes near the ground.

¶ 3. The thriving plant-eaters supported other life forms. ★ Fierce carnivores like Allosaurus hunted the massive herbivores with sharp claws and strong jaws. In the skies, flying reptiles and the very first feathered birds like Archaeopteryx glided between branches ★ (Pause 3: Starred other life forms). Tiny mammals scurried along the forest floor at night.

Exemplar Stop & Jot Response: "Plant food was abundant because splitting continents brought warm ocean water and regular rainfall inland, creating lush tropical forests instead of dry deserts."

Part 3: Evidence Ranking Master Key & Defense Rationale

Rank 1 (STRONGEST): Candidate D Airtight Cause & Effect

"Warm ocean waters brought regular rain, creating lush tropical forests and an endless food supply for plant-eaters."

Why it's #1: Directly connects both sides of the claim: the rainy climate (cause) and the explosion of food for plant-eaters (effect).

Jurassic Evidence Slides

Lesson 5 • Evaluating Evidence

Grade 6 Science & Literacy

The Jurassic: Choosing the Strongest Evidence

Guiding Question: How do readers choose the strongest evidence when several details seem useful?

Focus: Evaluating Evidence Strength & Embedding Quotes TEKS 6.5G-H • 6.6C-D • 6.8D

Academic Vocabulary & Word Study

Day 5 Word Bank

Jurassic Esp: Jurásico

The second Mesozoic period when giant plant-eating dinosaurs ruled lush, warm forests.

Environment Esp: Ambiente

The natural living conditions: climate, rainfall, temperature, and plant life.

Thrive Esp: Prosperar

To do more than just survive; to grow massive, succeed, and flourish in an ecosystem.

Evidence Esp: Evidencia

Specific textual details that most directly prove and defend an author's claim.

Turn to Page 1 of your student packet Notice the contrast with the dry Triassic!

Close Reading: 3 Strategic Pauses

Checkpoints

Pause 1 (¶1)

Wetter Climate

Pangaea splits apart. Warm ocean water brings regular rainfall, turning deserts into lush rainforests.

Task: [BOX] Climate Shifts

Pause 2 (¶2)

Sauropods Thrive

Endless plant food allows sauropods like Brachiosaurus to grow 80 feet long with long feeding necks.

Task: [UNDERLINE] Neck Trait

Pause 3 (¶3)

Ecosystem Life

Carnivores like Allosaurus hunt giants; feathered Archaeopteryx and furry mammals scurry in the trees.

Task: [★ STAR] Other Animals

Pause and annotate as you read on Page 1!

The Evidence Evaluation Lab

Target Claim

Claim to Prove:

"The warm, rainy Jurassic climate allowed giant plant-eating dinosaurs to thrive across the Earth."

Candidate A:

"Tiny, furry mammals scurried along the forest floor at night."

Candidate B:

"Fierce carnivores like Allosaurus hunted massive herbivores."

Candidate C:

"Enormous sauropods weighed more than ten elephants on four heavy legs."

Candidate D:

"Warm ocean rains created lush forests and an endless food supply."

Turn to Page 2: Apply the 3-Question Test to rank them!

The 3-Question Laser Beam Test

sprinted, saved energy, outlasted

Triassic CER Instructional Unit • Teacher Materials Page 1 of 2

Educator Instructional Guide

Facilitation Moves, Scaffolding & Scoring

Target: TEKS 6.8Dii-iii

Scripted Talk Moves for Reasoning Instruction

The "So What?" Challenge:

"Class, when you cite evidence, your reader asks: 'So what? Why should I care that legs were tucked under their bodies?' Your reasoning answers the 'So What?'—tell them how that body shape let them breathe, save energy, and survive!"

Connecting the Word Bank to the Flowchart:

"Look at your Reasoning Word Bank on Page 3. When you write your reasoning, grab power verbs like 'saved energy' and 'outlasted rivals' to prove the claim with scientific authority."

Common Student Writing Pitfalls & Real-Time Fixes

Pitfall 1: Parroting Evidence

Students re-say that legs were under their bodies without explaining the benefit.

Fix Move: "Tell me what that body shape let them do that lizards couldn't do."

Pitfall 2: Missing Transitions

Students jump into thoughts without transitional signposts.

Fix Move: "Check your transition toolbox: did you start with 'This shows that' and 'This matters because'?"

Tiered Writing Supports

ML / ELL Support

• Use cognate anchors: afirmación, evidencia, razonamiento.
• Complete the Part 5 mini-practice cloze frame orally before writing.
• Partner rehearse: Partner A reads Claim & Evidence; Partner B states Reasoning.

Striving Writers

• Follow the numbered 1-2-3 path on the Page 3 Pre-Writing Flowchart.
• Circle 2 target words in the Reasoning Word Bank before drafting.
• Check off items on the Step 5 revision checklist with a peer.

Advanced Extensions

• Challenge students to connect both evidence points (upright legs + extinction survival).
• Use contrasting transitions: "In contrast to sprawling archosaurs..."
• Synthesize long-term impacts into a culminating thesis.

Quick-Check Rubric for Guided CER (TEKS 6.8D)

Score	Claim & Evidence	Reasoning (Lesson Focus)	Transitions
3 • Mastery	Directly answers prompt; accurately cites specific text evidence.	Clearly explains how and why the trait helped dinosaurs survive; does not just copy.	Uses both evidence and reasoning transitions smoothly.
2 • Approaching	Clear claim; general or partially relevant evidence cited.	Reasoning is present but mostly summarizes or repeats the evidence ("The Copycat").	Uses 1 transition; slightly abrupt.
1 • Novice	Vague claim or missing evidence.	Reasoning is missing or unrelated to the claim.	No transitions used.

Triassic CER Instructional Unit • Teacher Materials Page 2 of 2

Teacher note: Uses the evidence transition ("According to the text") and quotes the specific fact from paragraph 2.

Reasoning:

"This shows that dinosaurs could run faster and breathe at the same time. This matters because it allowed them to chase food and save energy, helping them survive in a harsh environment while other animals struggled."

Teacher note: Two-part reasoning moves from immediate function (run faster, breathe) to broader survival significance (catch food, save energy).

Triassic CER Instructional Unit • Answer Key & Exemplars Page 1 of 2

Educator Reference • Assessment Key

Exemplar Responses & Diagnostic Rubric

Focus: TEKS 6.8Dii-iii

Part 4: Diagnostic Key — Weak vs. Strong Reasoning

Weak Reasoning: "The Copycat"

"This shows that their legs were under their bodies and they ran on two feet instead of sprawling like lizards."

Diagnostic: The student just reworded the evidence. There is no explanation of how or why this body shape gave them a survival edge.

Strong Reasoning: "The Connector"

"This matters because legs under their bodies saved energy and let them breathe while running, helping them outlast other predators."

Diagnostic: Explains the biological benefits (saving energy, continuous breathing) and connects them directly to competitive success.

Expected Turn & Talk Response: "To avoid sounding like a copycat, you have to explain why the fact helped them instead of just repeating what they looked like."

Guided Assessment Exemplars (Prompt: Triassic Importance)

Exemplar 1: Level 3 (Proficient Grade 6 Response) Standard Met

The Triassic Period was important in dinosaur history because it was when dinosaurs first appeared and developed body shapes that helped them survive. For example, the text states that early dinosaurs had upright legs tucked straight under their bodies, which let them run fast while breathing. This shows that early dinosaurs had a much more efficient body design than other reptiles. This matters in dinosaur history because it helped them survive when volcanic eruptions wiped out other large reptiles, allowing dinosaurs to take over the planet.

Exemplar 2: Level 4 (Advanced Grade 6 Response) Exceeds Standard

The Triassic Period was a vital turning point in dinosaur history because small dinosaurs survived a mass extinction that their competitors could not endure. According to the text, when huge volcanoes erupted at the end of the period, most large reptiles died out, but small dinosaurs survived because they were fast and used less energy. This shows that having an agile, efficient body allowed dinosaurs to outlast other species during environmental disasters. This matters because without this survival advantage during the Triassic, dinosaurs would never have grown to rule the Earth for the next 135 million years.

Targeted Teacher Feedback Prompts for Student Revisions:

If student repeats evidence in reasoning:

"Circle your reasoning. Now finish this sentence: 'This helped dinosaurs because...'"

If student forgets transitions:

"Add 'This shows that' before your explanation and 'This matters because' before your conclusion."

Triassic CER Instructional Unit • Answer Key & Exemplars Page 2 of 2

Problem: This just restates the fact in different words without explaining why it helped them!

Strong: The Connector

"This matters because legs under their bodies saved energy and let them breathe while running to outlast competitors."

Success: Connects the body trait to real survival impact and winning the race against competitors!

Ask yourself the "So What?" question: "Why does this evidence matter to my claim?"

Grammar Connection: Transition Toolkit

Signposts for Your Reader

Evidence Starters

• According to paragraph 2, ...
• For example, the author explains...
• As shown in the text, ...

Reasoning Starters

• This shows that [explain meaning]...
• This matters because [explain why it helped]...
• Consequently, dinosaurs could ...

Transitions guide your reader step-by-step from text fact to your conclusion!

Pre-Writing CER Flowchart

Step-by-Step Path

Assessment Prompt

Why was the Triassic Period important in dinosaur history?

1. Choose Claim

• "The Triassic was important because dinosaurs evolved traits to survive."

2. Choose Evidence

• "According to paragraph 2, dinosaurs had legs tucked straight under hips."

3. Pair 2 Reasoning

• "This shows that..."
• "This matters because..."

Word Bank: sprinted • saved energy • breathed while running • outlasted rivals • took over

Turn to Page 3 of your packet to write 4 Sentences: C + E + R1 + R2

Pause 1 (¶1):

Pause 2 (¶2): [Underline] long neck feeding adaptation.

Pause 3 (¶3): [★ Star] carnivores & birds in the forest.

Partner Reminder

"Warm rain = lush forests = endless food for giant herbivores!"

Stop & Jot: (Stem: "Plant food was abundant in the Jurassic because warm ocean rain...")

Grade 6 Science & Literacy • Lesson 5 Page 1 of 3

Lesson 5 • Evaluating Proof

The Evidence Evaluation Lab

Skill: Strongest Proof

Part 3: Rank Candidates (Strongest to Weakest)

Rank: 1 = Strongest • 4 = Weakest

Target Claim to Support:

"The warm, rainy Jurassic climate allowed giant plant-eating dinosaurs to thrive across the Earth."

Use the 3-Question Test to Rank Evidence:

Test 1: Mentions rain / climate?

Test 2: Connects to plant-eaters?

Test 3: Explains WHY they thrived?

Rank

Candidate A: "Tiny, furry mammals scurried along the forest floor at night."

Fails Test 1 & 2

Rank

Candidate B: "Fierce carnivores like Allosaurus hunted the massive herbivores."

Fails Test 1

Rank

Candidate C: "Enormous sauropods weighed more than ten elephants on four legs."

Passes Test 2 only

Rank

Candidate D: "Warm ocean rains brought regular rain, creating lush forests and endless food."

Passes All 3 Tests!

Defend Candidate D (Use this stem: "Candidate D is stronger proof than C because it directly links...")

Part 4: Grammar Connection — Embedding Quotes with Signal Phrases

Don't: Naked "Quote Bomb"

"The Jurassic was warm. 'Warm ocean waters brought regular rain.' Dinosaurs got big."

Do: Smooth Signal Phrase

"As the author explains in paragraph 2, 'regular rainfall created an endless food supply' for herbivores."

Mini-Practice: Complete this embedded evidence sentence:

According to paragraph 2, warm ocean waters brought .

Grade 6 Science & Literacy • Lesson 5 Page 2 of 3

Lesson 5 • Assessment Task

Guided CER: The Jurassic Environment

Writing Focus: Embedded Strongest Evidence

Assessment Prompt

How did the Jurassic environment enable giant plant-eating dinosaurs to thrive?

Pre-Writing Flowchart & Sentence Menu (Follow the Path) Combine 1 Claim + 1 Evidence + 2 Reasoning

1. The Claim

"The warm, rainy Jurassic climate allowed giant plant-eating dinosaurs to thrive across the Earth."

2. Embedded Evidence

• "As the text explains in paragraph 2, warm ocean rains brought..."

• "According to the reading, regular rainfall created..."

3. Pair 2 Reasoning

• R1: "This shows that having endless food meant sauropods could..."

• R2: "This matters because without this wet climate, giants never could..."

Reasoning Word Bank: endless food • tender leaves • canopy trees • consumed calories • reached colossal size • dominated

Write Your Complete CER Response 4 sentences: Claim + Embedded Evidence + 2 Reasoning sentences

Peer Check Protocol: Switch with a partner and mark their writing! Partner:

1. Underline the Claim

2. [Box] the Embedded Evidence

3. (Circle) the Reasoning

Grade 6 Science & Literacy • Lesson 5 Page 3 of 3

Reasoning Word Bank

Jurassic CER Instructional Unit • Teacher Materials Page 1 of 2

Educator Instructional Guide

Facilitation Moves, Scaffolding & Scoring

Target: TEKS 6.6C-D & 6.8D

Scripted Talk Moves for Evidence Selection

Using the 3-Question Elimination Test:

"Look at Candidate C on Page 2. Yes, sauropods weighed more than ten elephants! But ask yourself Test 1: Does it mention rain or climate? No! If it doesn't mention the climate, it cannot be your strongest proof for a claim about climate!"

The Signal Phrase Anchor:

"Never drop a naked quote into your paragraph! Weave it in smoothly by adding 'As the author reveals in paragraph 2,' so your writing flows naturally like a professional scientist."

Common Student Writing Pitfalls & Real-Time Fixes

Pitfall 1: Selecting the "Cool Fact"

Students rank Candidate C #1 because 10-elephant sauropods sound exciting.

Teacher Move: "Candidate C proves they were big, but does it tell us how the climate made them big? Look for the cause!"

Pitfall 2: The Floating Quote

Students write a quote standing completely alone as a sentence.

Teacher Move: "Add a signal phrase at the front: 'The passage reveals that...' to anchor the quote."

Tiered Writing Supports

ML / ELL Tier

• Provide Spanish cognates: ambiente / clima, evidencia, prosperar.
• Complete the Part 4 signal phrase mini-practice orally first.
• Scaffold peer check with color highlighters (Pink/Claim, Green/Evidence, Blue/Reasoning).

Striving Writers Tier

• Cross out Candidates A and B immediately using the 3-Question Test.
• Follow the step-by-step path on the Page 3 Pre-Writing Flowchart.
• Select 2 target words from the Reasoning Word Bank before drafting.

Advanced Extensions Tier

• Challenge students to blend a paraphrase with a direct quote in the same sentence.
• Connect food surplus to the evolutionary growth of apex predators like Allosaurus.
• Contrast Triassic arid limits with Jurassic lush abundance.

Quick-Check Rubric for Guided CER (Lesson 5 Focus)

Score	Evidence Strength (Focus)	Embedding & Transitions	Reasoning Connection
3 • Mastery	Selects the single most direct detail (Candidate D); directly links climate to food supply.	Evidence is embedded seamlessly with a signal phrase; no quote bombs.	Explains precisely how endless food allowed sauropods to reach colossal size and thrive.
2 • Approaching	Selects a relevant but indirect detail (e.g., Candidate C); mentions size without climate.	Evidence is present but stands awkwardly or uses a repetitive starter.	Reasoning is present but somewhat repetitious of the evidence words.
1 • Novice	Selects weak or irrelevant detail (Candidate A or B).	Drops a naked "quote bomb" with no introduction.	Reasoning is missing or illogical.

Jurassic CER Instructional Unit • Teacher Materials Page 2 of 2

Rank 2: Candidate C Relevant but Incomplete

"Enormous sauropods like Brachiosaurus weighed more than ten elephants and walked on four heavy legs."

Evaluation: Proves they grew massive, but omits how the environment caused it.

Rank 3: Candidate B Mentions Allosaurus predators; only proves that herbivores existed to be hunted.

Rank 4 (WEAKEST): Candidate A Mentions tiny mammals; completely irrelevant to giant plant-eaters thriving.

Jurassic CER Instructional Unit • Answer Key & Exemplars Page 1 of 2

Educator Reference • Assessment Key

Exemplar Responses & Peer Check Keys

Focus: TEKS 6.6C-D & 6.8D

Part 3 Defense Exemplar (Why D beats C)

Exemplar Student Defense:

"Candidate D is stronger proof because it directly explains that warm rain created lush forests and an endless food supply, which is the actual reason plant-eaters could thrive. Candidate C only describes how heavy sauropods were, but does not explain why the environment allowed them to get so big."

Guided Assessment Exemplars (Prompt: Jurassic Environment)

Exemplar 1: Level 3 (Proficient Grade 6 Response) Standard Met

The warm, rainy Jurassic climate allowed giant plant-eating dinosaurs to thrive across the Earth. [According to the text, warm ocean waters brought regular rainfall, which created lush tropical forests and an "endless food supply" for herbivores.] (This shows that sauropods had access to unlimited vegetation everywhere they went. This matters because without this continuous supply of plants, massive dinosaurs like Brachiosaurus never could have consumed enough calories to grow to 80 feet long and dominate the planet.)

Peer Check Annotation Key: Underlined = Claim • [Bracketed/Boxed] = Evidence • (Parentheses/Circled) = Reasoning.

Exemplar 2: Level 4 (Advanced Grade 6 Response) Exceeds Standard

The transformation of the Jurassic environment into a humid greenhouse enabled giant herbivores to flourish in unprecedented numbers. [As the author demonstrates in paragraph 2, regular rainfall caused plant life to explode, providing an endless food supply that allowed sauropods to reach weights greater than ten elephants.] (This proves that the environmental shift from dry Triassic deserts to wet Jurassic rainforests removed the nutritional limits on animal growth. Consequently, having towering canopies of ferns and trees rewarded dinosaurs with long necks, transforming plant-eaters into ecological titans that reshaped entire prehistoric ecosystems.)

Teacher Feedback Prompts During Peer Check:

If student dropped a "quote bomb":

"Notice how your quote starts abruptly. Add 'As stated in paragraph 2,' right before the quotation mark."

If student picked Candidate C instead of D:

"Your evidence tells me they were big, but not *why* the climate made them big. Swap in Candidate D for a direct link!"

Jurassic CER Instructional Unit • Answer Key & Exemplars Page 2 of 2

Elimination Tool

Test 1 Mentions rain / climate?

Test 2 Connects to plant-eaters?

Test 3 Explains WHY they thrived?

Candidate C (Flashlight)

"Sauropods weighed more than ten elephants..."

Passes Test 2 only. Does not explain how rain or climate caused giant size!

Candidate D (Laser Beam)

"Warm ocean rains brought regular rain, creating endless food..."

Passes ALL 3 Tests! Direct cause-and-effect proof!

Candidate D is our #1 choice for today's response!

Grammar: Smooth Quote Embedding

Avoid Quote Bombs!

Don't: The "Quote Bomb"

"The Jurassic was wet. 'Warm ocean waters brought regular rain.' Dinosaurs ate plants."

Problem: The quote sits alone with no signal phrase, making writing feel choppy.

Do: Smooth Signal Phrase

"As the author explains in paragraph 2, 'regular rainfall created an endless food supply' for plant-eaters."

Success: Seamlessly introduces the proof inside your own sentence!

Starters: "According to the text..." • "As the author points out..." • "The passage reveals that..."

Pre-Writing CER Flowchart

Drafting Guide

Prompt

How did the Jurassic environment enable giant plant-eating dinosaurs to thrive?

1. Claim

Warm, rainy climate allowed giant plant-eaters to flourish across Earth.

2. Evidence (Candidate D)

"As the text explains, warm ocean rains brought an endless food supply..."

3. Reasoning (x2)

Explain how endless calories allowed sauropods to reach 80 feet!

Word Bank: endless food • tender leaves • consumed calories • reached colossal size • flourished

Turn to Page 3 of your packet Peer Check: 1. Underline Claim • 2. [Box] Evidence • 3. (Circle) Reasoning

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