The first goal of this article to show the profound difference between how equality and similarity are understood in Greek geometry and how they are presented in modern mathematics classes. It highlights that the formula "equal-and-similar" reflects the distinct character of "equal" and "similar" as signs in Greek…

California public schools are changing both how they teach math, and also what they expect students to learn. In December 1997, state leaders adopted new math standards that include more than basic arithmetic skills. The framework lists five areas of math called "strands," that define what students from kindergarten through seventh grade…