Handout
CK-12 Foundation

Ck 12: Geometry: Symmetry and Tessellations Study Guide

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] Provides a brief overview of the different types of symmetry and of how to tessellate a shape.
Lesson Plan
Shodor Education Foundation

Shodor Interactivate: Lesson: Tessellations Geometry and Symmetry

For Teachers 3rd - 8th Standards
This lesson plan deals with tessellations and their geometric concepts. Upper elementary and middle school students will also explore polygons, symmetry, analyze patterns and explore the role of mathematics in nature and culture.
Activity
PBS

Pbs Teachers: Architecture: Community Geometry

For Teachers 3rd - 8th Standards
Identify architectural structures and objects in the community that represent different figures and types of geometry and mathematics.
Handout
University of St. Andrews (UK)

University of St. Andrews: Wilhelm Magnus

For Students 9th - 10th
This site, provided by the University of St. Andrews in Scotland, gives a biography of Wilhelm Magnus. Many interesting links are provided as well.