Problems 1. The problem material is based upon the experience of the child. 2. Unreal, impractical problems are not included. 3. Problems to which answers must be known before the problem can be formulated have been omitted. 4. The problems provide for the difference in ability that always exists in a class. 5. Projects are introduced in order to motivate and clarify the problem. 6. Many suggestions for projects are given. 7. The language of the problems has been made simple and concrete. 8. Methods in problem solving have been emphasized. 9. Problems are not made so as to have all of the results come out in whole numbers or small fractions. |