A high-interest reading intervention lesson designed for middle school students struggling with comprehension. Students learn and apply the core inference equation (Text Clues + Background Knowledge = Inference) through concrete detective-themed case files.
Valid Inferences: A dog escaped the house, knocked over its bowl, and jumped the fence (or a stray pet visited).
Case 02: The Sideline Mystery Multiple Choice + Evidence
Correct Answer: B (They are losing the game)
Valid Evidence Text Clues: "Jersey untucked", "Helmet upside down between cleats", "Five seconds left", "Buried his face in a white towel." (Accept any one of these).
Case 03: The Silent Cafeteria Table Character Feelings
Clues & Schema: Pulled hoodie tight, picked at single fry, slid test paper face down under tray, silent. Kids hide grades when they are embarrassed or disappointed.
Target Inference: Devon failed or got a bad grade on his math test, and he feels upset/ashamed to let his friend see it.
Case 04: The Secret Note in Locker 42 Written Sentence Builder
Exemplar Sentence 1: "I can infer that Elena is planning to try out for the basketball team after school."
Exemplar Sentence 2: "I know this because the author wrote 'TRYOUTS ARE TODAY! DON'T FORGET YOUR SNEAKERS!' and Elena smiled and stuffed her gym bag into her locker."
IEP Goal Rubric & Data Tracker Score each trial (1 point per criterion, 4 pts max per case)
Skill Level
1 - Emerging
2 - Developing
3 - Proficient (IEP Mastery)
Clue Identification
Guesses without text clues.
Locates text detail with teacher prompting.
Independently highlights valid concrete text clue.
Logical Inference
Conclusion contradicts facts.
Plausible inference but cannot articulate "why".
Logical inference directly justified by text evidence.
Teacher Guide • Clue Detectives Module Page 2 of 2
Inference: How did Devon do? Explain: [1 pt]
Devon received a poor or failing grade on his test and feels upset and embarrassed.
Case 04: The Secret Note in Locker 42 Worth: 2.5 pts
Expected Student Exemplar
"Elena noticed a bright yellow sticky note folded three times inside her science textbook. On the front, someone had drawn a small basketball and written in giant bold letters: TRYOUTS ARE TODAY! DON'T FORGET YOUR SNEAKERS! Elena smiled and immediately stuffed her gym bag into her locker."
Part 1: What is Elena planning to do? [1 pt]
...is planning to go to basketball tryouts today after school.
Part 2: What is the proving clue? [1.5 pts]
...the note said "TRYOUTS ARE TODAY!" and Elena smiled and brought her gym bag.
COMMON STRUGGLING READER MISCONCEPTIONS & CORRECTIONS:
• The Literal Trap: Student re-copies the whole passage instead of inferring. Prompt: "Tell me in your own words what that means without reading the sentence again."
• The Wild Guess: Student invents details not grounded in text. Prompt: "Show me the finger-touch clue on this paper that proves that happened."
Investigation Casebook • Master Answer Key Page 2 of 2