Mathematical Foundations

Teaching Math can be difficult. These classroom aids can help.

Direct Measurement

Counting Numbers          The Missing Digit          Negative Numbers      The Number Line

               Basic Arithmetic Operations      Basic Number Properties      Rational Number Line    Irrational Numbers

.              1 = 2   The Trouble with Zero      Direct Measurement

Appendix    Multiplication by Doubling and Halving           Inductive Proof for (a + b) = (b + a)      Credits