Students wrap the string from the problem on the left to the answer on the right, and then turn the Wrap-up over to see if they got it right. Use a stop watch to measure improvement and to see how fast they can really go.

Students wrap the string from the problem on the left to the answer on the right, and then turn the Wrap-up over to see if they got it right. Use a stop watch to measure improvement and to see how fast they can really go.