Summary
Two cases for Agents Olive and Otto. In "Soundcheck," things keep vanishing around town every time Otto plays a song by his favorite band — and the agents have to use number sense and subtraction to figure out what's disappearing and why. In "Double Trouble," Debbie from the pizzeria has doubled herself twice over, leaving four identical Debbies; when one goes missing, Olive and Otto count and reason their way to finding her.
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Teaching resources
Discussion questions
Discussion
Every Odd Squad case hides a math idea — these two are about taking away and doubling.
- In "Soundcheck," how did Olive and Otto figure out what was disappearing? What math did they use?
- What does it mean that Debbie "doubled"? If one Debbie doubles, how many are there? And if those double again?
- Why is it helpful to count carefully when something is multiplying fast?
- Where in real life do you see things double — like folding paper or counting pairs?
Quick work-a-long
Vocabulary: double, subtract, missing, total, pattern.
Try it: Start with 1 and keep doubling: 1, 2, 4, ___, ___. Write the next two numbers. Then draw the four Debbies and circle how many are left if one goes missing.