Evidence Investigator Slides Evidence Investigators
Cracking the Central Idea & Author's Argument
Grade 7 ELA Review Intensive
Do Now: The Case of the Missing Claim
"Video games are more than just entertainment; they can improve cognitive functions such as spatial awareness and problem-solving skills."
Your Mission:
Identify the Central Idea of this statement.
What one piece of evidence could you add to make this argument stronger?
Quick Check
Central Idea: The "big picture" or the anchor point of the entire text.
Argument: A claim supported by reasons and evidence to persuade the reader.
The Investigator's Toolkit: Types of Evidence
Facts & Statistics
Hard numbers and proven truths.
Anecdotes
Short personal stories that illustrate a point.
Expert Testimony
Quotes or findings from authorities in the field.
Specific Examples
Specific instances that prove the claim.
Case File #1
"Fire: Friend or Foe"
Check the excerpt on Phase 3 of your worksheet.
Evidence Spotlight: Fire
"Managers of some public lands now understand the importance of fire in the cycles of nature... The best answer to these problems appears to be to fight fire with fire. Land managers use prescribed fire, carefully planned burns..." (Paragraph 1)
"A prescribed fire should burn away heavy undergrowth of brush to remove potential fuel for wildfire. When a fire has plenty of fuel, it burns hotter and travels faster..." (Paragraph 4)
Investigating Central Idea
ANALYSIS REVIEW
Question Investigation:
"Which sentence best expresses the central idea of the article?"
A) Managers... understand importance of fire...
B) How do land managers decide...
C) Unfortunately, many forests...
How to solve it:
1
Check the Title: "Friend or Foe" suggests balance.
2
Look at Paragraph 1: It sets up the problem and the solution (the central idea).
3
The "Umbrella" Test: Which option covers the *whole* passage?
Analyzing Evidence
ANALYSIS REVIEW
The Author's Claim:
"The best answer to these problems appears to be to fight fire with fire."
Look at Paragraph 4:
"A prescribed fire should burn away heavy undergrowth... to remove potential fuel for wildfire."
Why it works:
This evidence explains HOW the solution works. It's a functional example that supports the claim.
Case File #2: Birth of the Cool
Excerpt: Paragraph 2
"Such gracious living had been a long time coming. Until the mid-1800s, Americans kept food from spoiling by storing it in streams, cellars, snow, and ice... In the heat, bacteria bloomed so rapidly that killer food poisoning was referred to as 'summer complaint.'"
Work with your partner to analyze this evidence on Phase 4 of your handout.
Closing the Case
Key Takeaways:
Central Idea is the text's "main mission."
Evidence must directly link back to the claim.
Strong Arguments use multiple types of evidence (Facts, Anecdotes, etc.).
Final Mission:
Complete the Exit Ticket on your handout individually. Use your toolkit to verify your choices!
Evidence Investigator Worksheet Evidence Investigators
Case File: Central Idea & Argument Review
Name: ____________________
Date: _____________________
Phase 1: Do Now
"Video games are more than just entertainment; they can improve cognitive functions such as spatial awareness and problem-solving skills."
1. What is the Central Idea of the statement above?
2. Provide one piece of EVIDENCE that would make this argument stronger.
Phase 2: Investigator's Toolkit
Evidence Type Definition & Example Facts & Stats Anecdotes Expert Testimony
Phase 3: Case File #1 (Fire: Friend or Foe)
Paragraph 1: "Managers of some public lands now understand the importance of fire in the cycles of nature... The best answer to these problems appears to be to fight fire with fire."
Paragraph 4: "A prescribed fire should burn away heavy undergrowth of brush to remove potential fuel for wildfire. When a fire has plenty of fuel, it burns hotter and travels faster..."
Guided Note: Central Idea Investigation
Based on Paragraph 1, what is the author's primary focus? ____________________________________________________________________
Guided Note: Evaluating Evidence
Look at Paragraph 4. How does the description of "heavy undergrowth" support the claim that we should "fight fire with fire"?
Phase 4: Collaborative Lab (Birth of the Cool)
Text Excerpt: Paragraph 2
"Such gracious living had been a long time coming. Until the mid-1800s, Americans kept food from spoiling by storing it in streams, cellars, snow, and ice. It was a system that worked better in the cool seasons. In the heat, bacteria bloomed so rapidly that killer food poisoning was referred to as 'summer complaint.'"
1. How does the author support the claim that "gracious living had been a long time coming"?
A) By describing the excitement caused by new improvements in refrigerators.
B) By describing the menus recommended by refrigerator manufacturers.
C) By tracing the development of various methods for keeping food cool.
D) By explaining the relationship between temperature and food safety.
Analysis Task:
What type of evidence is "storing it in streams, cellars, snow, and ice"?
How does listing these older methods prove that modern "gracious living" was "a long time coming"?
Review Mastery Guide Review Mastery Guide
Teacher Resource: Central Idea & Argument
Duration: 60 Minutes
Lesson Objective
Students will be able to identify central ideas and analyze how authors use specific types of evidence to support their arguments by reviewing text excerpts adapted from the NY Grade 7 ELA Interim Assessment 3.
Standards Alignment
RI.7.1: Cite several pieces of textual evidence to support analysis.RI.7.2: Determine two or more central ideas in a text.RI.7.8: Trace and evaluate the argument and specific claims in a text.
Required Materials
Evidence Investigator Slides
Student Worksheets (Includes Text)
Instructional Pacing
5 min
Do Now & Hook
Review the Do Now. Explain that today they are "Investigators" looking for how claims are built.
10 min
Evidence Toolkit
Guided completion of Phase 2 table. Use Slide 3 to define Facts, Anecdotes, and Expert Testimony.
15 min
Guided Case Study (Fire)
Read the excerpt for "Fire: Friend or Foe" as a class. Use Slide 6 & 7 to model evaluating the "Functional Example" in Paragraph 4.
20 min
Collaborative Lab (Cool)
Partners read the "Birth of the Cool" excerpt on Phase 4. They must categorize the evidence (Historical Examples) and explain its weight.
10 min
Closing & Exit Ticket
Individual completion of the summary detail question. Collected for standard mastery check.
Instruction Support
Passage Access:
Since students don't have test booklets, direct them strictly to the highlighted excerpts on the worksheet. If they need context, provide a 1-sentence summary of the missing parts of the article.
Check for Understanding:
Ask: "If the author removed the list of storage methods (streams, cellars), would the claim 'it was a long time coming' be as believable?"
Master Answer Key
Phase 1: Do Now
Central Idea: Video games provide cognitive benefits beyond entertainment.
Phase 2: Toolkit
Facts/Stats: Verifiable data (e.g., 40 million acres at risk).Anecdotes: Personal narrative (e.g., Faith Jackson's memory of ice cutting).Expert Testimony: Insights from specialists (e.g., Scientist quotes).
