by Dan Meyer

• 1. Guess how many levels he'll make with all those toothpicks.
• 2. Write down an answer you know is too high. Too low.

• video — building the pyramid

• 3. What information would be useful to know here?
• 4. What information doesn't matter?

• image — the toothpick count

• video — the answer

• 5. We used a pack of 250 toothpicks and made 12 levels. If we used another 250 toothpicks, how many levels would that make?
• 6. Write a function t(l) that takes the number of levels (l) and returns the total number of toothpicks (t) in that pyramid.