Reading Radar Practice Packet
Reading Radar Comprehension Lab • Grade 7
Name: Date:
Core Strategy Toolkit & Case File 1
Main Idea
Topic + the author's primary message. Ask: What does the text want me to know?
Inference
Text Clue + Background Knowledge = Smart deduction about unsaid truths.
Context Clues
Scan sentences before and after unfamiliar words for synonyms, contrasts, or definitions.
Summarizing
Briefly retell only key events and facts. Leave out minor trivia and personal opinions.
Level 1: Accessible
Case File #1: The Mystery of the Crow Funeral
Lexile ~820L • 240 words
¶ 1 If you spend time watching urban trees, you might witness an eerie spectacle. When a crow dies on a lawn, the first bird to discover the body does not fly away. Instead, it unleashes a barrage of shrill, repeating alarm caws. Within minutes, dozens of crows arrive from all directions, perching on power lines, fence posts, and nearby branches. For up to twenty minutes, the entire flock creates an intense commotion, screeching in chorus while staring down at their fallen companion.
¶ 2 For centuries, people believed crows were mourning their dead like grieving human mourners. However, wildlife biologists recently ran controlled experiments to uncover the truth. Researchers walked into public parks holding taxidermy preserved crows. The living crows immediately mobbed the researchers, dive-bombing their heads and shrieking warnings. Even weeks later, whenever those same researchers returned—even without the dead bird—the flock recognized their specific faces and sounded furious alarms.
¶ 3 These findings prove that a "crow funeral" is not an emotional wake; it is an emergency safety briefing. Crows are hyper-intelligent problem solvers. When one perishes, the flock gathers to investigate the exact cause of death so they can avoid the dangerous predator or hazard. By sharing information instantly across the flock, crows remain remarkably vigilant, ensuring the survival of the entire colony.
Radar Quick Check (Before Answering Questions):
Underline the sentence in Paragraph 3 that reveals the real scientific reason crows gather around a dead flock member. Then turn to Page 2 to begin your investigation tasks.
Reading Radar • Student Practice Packet Page 1 of 6
Tasks
Investigation Record #1: The Crow Funeral
Skills: Main Idea • Vocab • Inference • Summary
Task 1: Main Idea RI.7.2
Which statement best expresses the central idea of the passage?
A. Crows mourn the loss of friends and family members by weeping together in large trees.
B. Crows assemble around dead birds to investigate threats and learn how to avoid danger.
C. Park researchers frequently harm wild crows during scientific wildlife experiments.
D. Urban crows only communicate with repeating alarm calls when food is scarce.
Task 2: Vocabulary Context Clues RI.7.4
In Paragraph 1, the author states the birds create an intense commotion. What does commotion mean?
A. A silent, thoughtful prayer
B. A noisy, chaotic disturbance
C. A friendly greeting ritual
D. A nest-building routine
Write one context clue from Paragraph 1 that helped you determine this meaning:
Task 3: Drawing Inferences RI.7.1
Based on Paragraph 2, what can you infer about a crow's memory and facial recognition?
Explain your answer using one piece of factual evidence from the text.
Task 4: Concise Summary Frame RI.7.2
Complete this 3-sentence summary of the text without adding unnecessary minor details:
1. When a crow dies, the flock gathers and...
2. Although people thought crows were grieving, researchers discovered...
3. Ultimately, these gatherings help the flock survive by...
Reading Radar • Student Practice Packet Page 2 of 6
Reading Radar Case File 2
Name: Date:
Deep Ocean Hunt: The "Ship of Gold"
Level 2: Intermediate
Case File #2: The Salvage of the Central America
Lexile ~910L • 310 words
¶ 1 In September 1857, a colossal steamship named the SS Central America was cruising along the Carolina coast when it was struck by a category two hurricane. For three agonizing days, passengers and crew bailed rising ocean water with buckets, but the roaring waves extinguished the ship’s steam boilers. Paralyzed without engine power, the vessel sank beneath eight thousand feet of freezing Atlantic water, taking 425 souls and three tons of freshly minted California Gold Rush treasure down with it.
¶ 2 For over 130 years, historians considered the wreck completely unrecoverable. The site was located in a perilous abyss where sunlight never penetrates and bone-crushing water pressure would instantly collapse conventional submarines. Traditional divers could not survive even a fraction of that depth. The sunken treasure became known as legendary ghost money, lost forever to the ocean floor.
¶ 3 Enter Tommy Thompson, a brilliant marine engineer from Ohio. Rather than using standard dive gear, Thompson designed an innovative six-ton robotic rover named Nemo. Equipped with high-definition cameras, mechanical gripper arms, and sensitive acoustic sonar, Nemo began systematically combing the deep ocean floor in 1988. Thompson’s crew endured years of equipment breakdowns and hostile sea storms, yet they refused to abandon their mathematical search grid.
¶ 4 In late 1988, Nemo’s cameras transmitted a breathtaking sight to the surface ship: a massive timber hull carpeted in thousands of gleaming coins, gold bars, and nineteenth-century pocket watches. Through tireless persistence and cutting-edge robotics, Thompson executed the most successful deep-ocean salvage in American history, proving that human ingenuity could conquer the ocean’s darkest graveyard.
Reader Annotation Clue: Notice how Paragraph 2 highlights the impossible obstacles (darkness, crushing pressure), while Paragraph 3 explains the specific engineering solutions that solved them. Keep this contrast in mind for your analysis on Page 4.
Reading Radar • Student Practice Packet Page 3 of 6
Tasks
Investigation Record #2: The "Ship of Gold"
Skills: Central Idea vs. Minor Detail • Vocab • Inference • Summary
Task 1: Central Idea & Distinguishing Details RI.7.2
Part A: Which statement best expresses the main idea of the entire text?
A. Hurricanes frequently sink steamships off the coast of North Carolina.
B. Through innovative robotic technology and determination, a legendary deep-sea shipwreck was finally found.
C. Nineteenth-century pocket watches preserve remarkably well in cold saltwater.
D. Tommy Thompson was a marine engineer born and raised in Ohio.
Part B: Why is Option D considered a minor detail rather than the central idea?
Task 2: Vocabulary in Context RI.7.4
1. In Paragraph 2, perilous most closely means:
A. Extremely dangerous
B. Peaceful and calm
C. Shallow and warm
2. In Paragraph 4, salvage most closely means:
A. Accidental destruction
B. Rescue or recovery of lost goods
C. Building a museum exhibit
Task 3: Drawing Inferences with the Equation RI.7.1
What can you infer about why other treasure hunters failed to find the SS Central America between 1857 and 1988?
Text Clue (What the passage states):
My Inference (What this proves):
Task 4: Objective Summary Writing RI.7.2
In 2 to 3 complete sentences, write an objective summary of Tommy Thompson’s achievement. (Do not include personal opinions like "It was cool" or "I think"):
Reading Radar • Student Practice Packet Page 4 of 6
Reading Radar Case File 3
Name: Date:
Masters of Deception: Animal Mimicry
Level 3: Target Grade 7
Case File #3: The High-Stakes Art of Survival
Lexile ~980L • 350 words
¶ 1 In the natural world, survival is an unyielding game of life and death. While many creatures rely on sheer muscular speed, razor-sharp talons, or heavy armored shells to fend off predators, some of the planet’s most prosperous species utilize a far subtler weapon: deception. Through evolutionary adaptation known as mimicry, harmless organisms imitate the appearance, sounds, or behaviors of toxic, hazardous, or inedible species to cheat death.
¶ 2 One celebrated example is Batesian mimicry, named after British naturalist Henry Walter Bates. In this strategy, a defenseless organism copies the warning signals of a genuinely dangerous animal. Consider the hoverfly: this harmless insect possesses no stinger and cannot inject poison, yet it displays bold yellow and black abdominal stripes that identically match the yellowjacket wasp. Hungry songbirds, having previously suffered excruciating stings from actual wasps, instinctively avoid the defenseless hoverfly, granting the fly safe passage.
¶ 3 Other creatures take mimicry into dynamic realms. The Indonesian mimic octopus does not simply adopt one static disguise; it actively shifts its skin texture, coloration, and bodily posture to impersonate more than a dozen distinct venomous animals. When threatened by damselfish, the octopus tucks six of its arms into a burrow, spreading its remaining two arms in opposite directions while flashing banded black-and-white rings. To the terrified damselfish, the octopus has completely transformed into a deadly banded sea snake.
¶ 4 Yet mimicry is not strictly defensive. In a devious twist known as aggressive mimicry, predators disguise themselves as harmless or enticing objects to ensnare unsuspecting prey. The alligator snapping turtle lies motionless on murky riverbeds with its dark jaw wide open, wiggling a fleshy, pink, worm-like appendage on its tongue. When an eager fish swims inside to snatch the "worm," the turtle’s jaws snap shut like a steel bear trap. Whether for protection or hunting, trickery remains one of nature’s most effective biological adaptations.
Text Structure Clue: The author organizes this passage by introducing a main concept (¶ 1) and then providing distinct real-world examples (Batesian ¶ 2, Dynamic ¶ 3, Aggressive ¶ 4).
Reading Radar • Student Practice Packet Page 5 of 6
Tasks
Investigation Record #3: Masters of Deception
Skills: Synthesis & Independent Mastery
Task 1: Central Idea & Evidence RI.7.2
Part 1: What is the central idea of the passage?
A. Alligator snapping turtles are the most dangerous reptiles in North American rivers.
B. Animals utilize various forms of deceptive mimicry as powerful tools to survive, defend, and hunt.
C. Yellowjacket wasps sting songbirds to teach them to stay away from insect nests.
D. The Indonesian mimic octopus is the only animal capable of altering its physical shape.
Part 2: Quote or cite one sentence from Paragraph 1 that directly states this central idea:
Task 2: Context Clues Analysis RI.7.4
In Paragraph 4, the author states predators use trickery to ensnare unsuspecting prey. What does ensnare mean?
A. To trap or capture
B. To scare away
C. To feed and nurture
D. To educate or train
Which phrase from Paragraph 4 provides the strongest clue for the meaning of ensnare?
Task 3: Drawing Inferences RI.7.1
Why does Batesian mimicry (like the hoverfly) only work if the dangerous animal (the wasp) is common in the same area?
Think: What must predators experience first before the disguise protects the mimic?
Task 4: Complete Summary Challenge RI.7.2
Write a 3-sentence summary of the entire passage explaining what mimicry is and the two main ways animals use it (defense vs. hunting):
Radar Self-Check: Rate your confidence (1 = Need Help, 4 = Mastered!)
Main Idea: [ ] Inference: [ ] Context Clues: [ ] Summarizing: [ ]
Reading Radar • Student Practice Packet Page 6 of 6
Reading Radar Answer Key
Teacher & Facilitator Key Reading Intervention • Grade 7
Exemplars & Intervention Prompts
Reading Radar Answer Key & Guide
Targeted Coaching Prompts for Struggling Readers
Main Idea Trap: Watch for students picking a true minor fact. Prompt: "Does the whole text focus on this, or just one sentence?"
Inference Gap: Struggling readers guess wildly. Prompt: "Point your finger to the exact clue in the text that sparked that thought."
Context Clues: Remind students to substitute choices into the original sentence to test which one maintains logical sense.
Summary Rule: Enforce "No trivia, no opinions." Summaries must outline the big structural arc of the text.
CASE FILE #1: THE MYSTERY OF THE CROW FUNERAL Level 1: Accessible
Task 1 (Main Idea): Correct: B
Rationale: Option B captures the core discovery of the entire passage (crows gather to investigate threats and stay vigilant). A is a popular myth debunked by the text; C and D are inaccurate or minor.
Task 2 (Context Clues): Correct: B (A noisy, chaotic disturbance)
Acceptable Context Clues: "shrill, repeating alarm caws", "screeching in chorus", "barrage of caws", or "dozens of crows arrive from all directions".
Task 3 (Inference with Evidence): Exemplar response:
Exemplar: "Crows have exceptional long-term memory and can remember human faces who pose a threat. The text states that even weeks later, whenever those same researchers returned without the dead bird, the flock still recognized their specific faces and sounded alarms."
Task 4 (Summary Frame): Model completion:
1. ...calls loudly to bring dozens of other crows together.
2. ...they gather to investigate the cause of death and identify dangerous predators.
3. ...sharing threat information so they can stay vigilant and avoid the same fate.
CASE FILE #2: THE SALVAGE OF THE CENTRAL AMERICA Level 2: Intermediate
Task 1 (Part A): Correct: B Task 1 (Part B): Explanation
Part B Exemplar: Option D is a minor background fact about Thompson's hometown; it does not explain what happened to the ship, the engineering obstacles, or the recovery of the treasure.
Task 2 (Context Clues): 1. A (Extremely dangerous) | 2. B (Rescue or recovery of lost goods)
Reading Radar • Facilitator Answer Key Page 1 of 2
Key Continued
Case File #2 (Cont.) & Case File #3
Standards: RI.7.1 • RI.7.2 • RI.7.4
