Which One of the Following Teaching Strategies Is Consistent with the Textbook's

Multiple Choice

Which one of the following teaching strategies is consistent with the textbook's discussion of children's mathematical development?

A) Making sure that children have acquired most of the characteristics of Piaget's formal operations stage before they begin to solve problems
B) Teaching tricks such as "When you see the word less in a problem, you should subtract"
C) Having children practice procedures in isolation before applying them to real-life situations
D) Making sure that children know why procedures work as well as how to use them