Practice
1. Which CGI word problem type is most closely associated with the counting back strategy?
2. For what sorts of numbers is counting back an efficient strategy? (Efficient means it can be reliably be used in a short amount of time--3 seconds of less).
3. Write a word problem for introducing counting back as a strategy.
4. Describe both ways of using counting back to solve the problem: 8-3
5. What is a good thing to practice to help children be ready to use counting back as a strategy to solve problems?
6. How can you use manipulatives to help children understand counting back as a strategy?
7. What sorts of manipulative use encourages children to develop counting strategies for subtraction instead of direct modeling?