The way definitions are written can either help or hinder our proof-writing skills

How you can encourage some creativity in your geometry students, by suggesting they write their own theorems

Trisecting an angle is impossible with a straight-edge and compass, but a special tool called a 'tomahawk' makes this construction possible.

How to help students understand how the words some, all, and none work together in logic statements

A discovery based lesson in which students will use a graphing calculator to explore how the equation of an ellipse relates to its graph

A linear coordinate geometry math problem that can be solved in at least four different ways

Two very different way of looking at transversals - comparing them to goal posts and continents

Some thoughts about how we decide what we can assume, based on a diagram in a geometry problem