After reading the book Sadako and the Thousand Paper Cranes by Eleanor Coerr and learning about the tradition of Senbazuru (folding 1,000 paper cranes), students will determine how long it would take a person to fold 1,000 cranes by him/herself. They will time themselves folding 1, 3, and 5 cranes. Then, they will use those recorded times to determine how long it will take them to fold 20 and 1,000 cranes.