Other
Math Ed Page: Angles: A Set of Three Lessons
There are a set of three lessons here that help students with the concepts of angles. Each of the lessons is a hands on approach to help students learn fundamentals angles and fundamental properties in geometry.
Other
Mathedpage.org: Algebra Manipulatives: Comparison and History
This resource discusses the use of manipulatives in the study of Algebra. The author sees benefits in symbol manipulation to enrich understanding, in geometric interpretation strengthening the connection to other parts of mathematics,...