📖 Part 1: Read the Mystery

The Magic Marker Mystery

On Monday morning, Ms. Rivera placed a brand-new set of twelve magic markers on the supply table. The markers were special because each one could write in a different color, including silver, gold, and a bright green called Dragon Leaf. The art club planned to use them for posters about the school garden.

“Please leave them here until our meeting after lunch,” Ms. Rivera reminded the class. She placed the markers inside a clear plastic box and snapped the lid shut. Then she wrote the words GARDEN GROWTH on the board in purple chalk.

At recess, the class left the room. When students returned, the marker box was gone. The classroom door had remained open, but no one had seen a stranger enter. Ms. Rivera asked the students to think carefully before making accusations.

Three clues quickly appeared. First, a trail of tiny green dots led from the supply table toward the reading corner. Second, the window beside the reading corner was open, although the morning had been chilly. Third, a damp paw print marked the floor beneath the window.

Most students suspected Oliver, who had been working near the supply table before recess. Oliver admitted that he had picked up the box to look at the colors, but he insisted that he had returned it. “I put it exactly where I found it,” he said. A smear of purple chalk on his sleeve made him look even more suspicious.

Jada, who loved solving puzzles, did not think the evidence fit. The green dots began near the table but became larger near the window. Also, the paw print had four small toes and a wide heel. It looked more like a cat’s paw than a person’s shoe. Jada remembered that the school custodian’s orange cat, Pumpkin, sometimes slipped into classrooms when the windows were open.

Jada examined the reading corner. Behind a basket of old newspapers, she found a green marker cap. The cap had a shallow tooth mark along its edge. She also noticed a thin blue thread caught on the basket. The art club’s supply cart had a blue cloth cover, but the cart was usually kept in the hallway.

Instead of searching randomly, Jada reconstructed what might have happened. Pumpkin had probably entered through the open window and knocked the box from the table while chasing something. The lid had popped open, allowing the markers to roll across the floor. The cat may have carried or batted the green marker toward the reading corner. But where was the box?

Jada checked the hallway and found the supply cart parked outside the classroom. One wheel was wet from the morning cleaning. A thin line of green ink marked the cart’s blue cover. When Jada lifted the cover, the missing box was tucked underneath it. The box had likely been placed there when the cart was moved past the open door.

Oliver’s chalk smear had a simple explanation: he had erased part of the garden poster before recess. The blue thread came from the cart cover, and the paw print belonged to Pumpkin. The mystery was solved. Jada returned the markers to Ms. Rivera, who thanked everyone for using clues instead of jumping to conclusions. At the art club meeting, the students made a sign that read, “Look closely. Think carefully. Ask questions.”

🔎 Part 2: Comprehension and Analysis

✅ Answer Key and Sample Responses

1. Acceptable evidence includes: the marker box was found under the supply cart; the blue thread came from the cart cover; the green ink marked the cart; Oliver said he returned the box; and his purple chalk smear came from erasing the poster. Students should explain that these details point away from Oliver as the thief.

2. Sample theme: People should examine evidence carefully instead of making quick accusations. Jada studies the clues before blaming Oliver, and she explains the chalk smear instead of treating it as proof of guilt. The class also learns to “look closely,” “think carefully,” and “ask questions.”

3. Sample summary: A classroom marker set disappears before the art club meeting. Students notice green ink, an open window, and a paw print, so Oliver becomes a suspect. Jada investigates and connects the clues to Pumpkin and the supply cart. She finds the box under the cart cover and determines that the cat likely caused the box to fall and the cart helped hide it.

4. Jada begins as a student who questions the obvious accusation. She becomes more methodical by comparing clues, reconstructing events, and searching likely locations. By the end, she solves the mystery through careful reasoning rather than guessing.

5. Finding the marker cap with a tooth mark connects the mystery to Pumpkin. Finding the blue thread points toward the supply cart. Together, these clues lead Jada to inspect the cart, where she discovers the missing box and resolves the mystery.

6. Figured out the likely order of events.

7. Without a plan or order.

8. The marker was probably moved or batted toward the window, causing more ink to leak or make larger marks as it traveled. Answers should connect the larger dots to movement toward the window.

9. Green dots suggest that the green marker traveled toward the window. The paw print suggests that Pumpkin entered the room. The blue thread and green ink suggest that the marker box came into contact with the supply cart. The purple chalk suggests Oliver had worked with the board, not that he stole the markers.

10. Sample CER response: Pumpkin caused the marker mystery, although the supply cart helped hide the box. The story says that the paw print looked like a cat’s paw and that the marker cap had a tooth mark. It also says that green ink and a blue thread connected the box to the cart. These clues show that Pumpkin likely knocked the box down, while the cart’s cover caught or hid it. Therefore, the evidence clears Oliver and points to an accident caused by the cat.