by Dan Meyer

• 1. Who do you think did the best job drawing a square?
• 2. Rank each person. Explain your ranking.

• video — the square competition

• 3. What information is important?
• 4. What information doesn't matter?

• image — the angles
• image — the side lengths
• image — the coordinates
• image — the areas

• 5. Come up with a formula that will use the information that matters and then return a number to tell us who did the best and worst job drawing a square.
• 6. Test your formula. Does it work for very large and very small cases?

• image — the answer
• file — teacher's guide

• best circle
• best midpoint
• best triangle