Knowles Science Teaching Foundation Portfolio 2006 2007

**Mathematical Essays**

**Instructional Unit: Geometry of Circles**

Lesson 1: Circumference of a Circle

Lesson 3: Parallelogram, Circle, Vertices

Lesson 4: Tangents to a Circle

Lesson 6: Inscribed Quadrilaterals

Lesson 8: Length of Chord, Distance from Center

Microsoft Office version of Circles Unit

**Some of my favorite links.**

The Department of Mathematics Education

MacTutor History of Mathematics Site -- St. Andrew's University

Math Forum(alias Geometry Forum)