Complete Catchers Teacher Guide Complete Catchers
Teacher Instruction Guide
Lesson Objective
Students will identify the two essential components of a complete sentence (subject and predicate) and demonstrate their ability to transform fragments into complete thoughts.
Materials Needed
"Complete Catchers" Presentation Slides
"Sentence Fixer" Student Worksheet
"Sentence Sort" Activity Cards
Pencils and highlighters (two colors)
Lesson Flow (60 Minutes)
10 min
The Hook: The Case of the Missing Meanings
Introduce the "Detective" theme. Present a few confusing fragments and ask students why they are hard to understand.
15 min
Direct Instruction: The Two Partners
Use slides to define the Subject (Who/What) and the Predicate (What they are doing). Use the "Handshake" analogy—it takes two to make a sentence.
15 min
Guided Practice: Sentence Repair Shop
Model how to add missing parts to fragments on the board. Work through the first 3 questions of the "Sentence Fixer" worksheet together.
20 min
Independent Practice: Sorting Evidence
Students complete the "Sentence Fixer" worksheet or work in small groups on the "Sentence Sort" activity.
Key Vocabulary
Subject
The naming part (who or what).
Predicate
The telling part (the action or state of being).
Fragment
An incomplete thought missing a piece.
Teacher Tips
"Remind students that a long sentence isn't always a complete one, and a short sentence (like 'Run!') can be complete."
Watch out for students who think capital letters and periods alone make a sentence complete.
Instructional Script
Introduction: The Mystery Fragment
"Class, imagine I walked into the room today and just said, 'Into the spooky house.' and walked back out. Would you know what happened? No! You'd be waiting for more. That's a sentence fragment. It's like a mystery without an ending. Today, we're becoming sentence detectives to catch these fragments and fix them."
Checking for Understanding
Ask This
"If a sentence has a subject but no predicate, what is missing?"
Expected Answer
"The action! We don't know what the subject is doing."
Differentiation Strategies
For Struggling Learners
Provide color-coded sentence strips where the Subject is always blue and the Predicate is always orange. Have them physically join the two parts together.
For Advanced Learners
Challenge students to identify fragments in a popular storybook and rewrite them to change the meaning of the scene.
For EL Students
Use visual cards where the "Subject" is represented by a person icon and the "Predicate" by a motion icon (like running shoes).
Closure Activity: The 60-Second Challenge
Write one word on the board (e.g., "The cat"). Give students 60 seconds to turn that word into the most creative complete sentence they can. Have 3 students share and identify their subject and predicate.
Complete Catchers Slides Complete Catchers
Sentence Investigation Unit
The Case of the Missing Meaning
"Into the spooky house..."
Who went there?
What happened?
Essential Evidence
Every Complete Sentence needs two partners to solve the mystery.
1
Subject
2
Predicate
They must work together
Part 1: The Subject
The Naming Part
The Subject tells us who or what the sentence is about.
The hungry dog
The shiny rocket
Professor Pen
Part 2: The Predicate
The Telling Part
The Predicate tells us what the subject is doing or is.
...ate the bone.
...blasted into space.
...is a great detective.
Case Closed: A Complete Sentence
The hungry dog
ate the bone.
The hungry dog ate the bone.
Fragment Alert!
A fragment is a piece of a sentence that is missing either the Subject or the Predicate.
It doesn't tell a complete thought!
Sentence Repair Shop
Identify what's missing and fix these fragments:
1. My best friend...
Missing Predicate!
2. ...danced across the stage.
Missing Subject!
3. The big, blue balloon.
Missing Predicate!
Detective's Checklist
Subject
Does it have a who or what?
Predicate
Does it have an action or telling part?
Thought
Does it make sense on its own?
Sentence Fixer Worksheet Sentence Fixer
Official Detective Worksheet
Agent Name:
Date:
Detective Briefing
A complete sentence needs a Subject (who or what) and a Predicate (the action). If one is missing, it's a Fragment . Your mission: find the fragments and fix them!
1
Part 1: Case Investigation
Read each entry. Circle S if it is a complete sentence or F if it is a fragment.
1. The stealthy cat crept across the roof.
S
F
2. Into the deep, dark woods.
S
F
3. My brother's favorite new video game.
S
F
4. She smiled at the funny joke.
S
F
5. Floated away into the sky.
S
F
2
Part 2: Sentence Repair Shop
Fix the fragments below by adding a Subject or a Predicate to make them complete.
1. The giant, purple robot
2. ...splashed into the swimming pool.
3. Three tiny kittens
4. ...ate a whole pepperoni pizza.
3
Part 3: Undercover Writing
Write your own complete sentence for each picture prompt below. Don't forget your capitals and periods!
Sentence Fixer Answer Key Answer Key
Sentence Fixer Worksheet
Teacher Reference
1
Part 1: Case Investigation
1. The stealthy cat crept across the roof.
S — Sentence
2. Into the deep, dark woods.
F — Fragment (Missing Predicate)
3. My brother's favorite new video game.
F — Fragment (Missing Predicate)
4. She smiled at the funny joke.
S — Sentence
5. Floated away into the sky.
F — Fragment (Missing Subject)
2
Part 2: Sample Repairs
Answers will vary. Ensure students added a logical subject or predicate.
1. The giant, purple robot...
...clomped through the downtown streets.
2. ...splashed into the swimming pool.
The excited golden retriever...
3. Three tiny kittens...
...napped on the soft, fuzzy rug.
4. ...ate a whole pepperoni pizza.
The hungry basketball team...
3
Part 3: Grading Criteria
Check for Ghost Prompt:
Capitalized "The ghost" or name
Action (e.g., "haunted the attic")
Ends with a period
Check for Plane Prompt:
Capitalized Subject (e.g., "The airplane")
Action (e.g., "flew over the clouds")
Ends with a period
