Lesson Plans and Teaching Materials
I've heard parents complain "my daughter makes collages from magazine clippings in her high school geometry class instead of learning real math". Some of the lesson plans listed here are like that, but are perhaps appropriate as auxiliary material. The better plans here teach some real mathematics as the students perform their projects. I haven't made much attempt to go through the rest of the junkyard to find appropriate teaching resources that aren't already arranged into lesson plans; you'd be better off doing it yourself.
Algorithmic vectorial geometry, French geometry e-textbook by J.-P. Jurzak.
Border pattern gallery. Oklahoma State U. class project displaying examples of the seven types of symmetry (frieze groups) possible for linear patterns in the plane.
Cinderella multiplatform Java system for compass-and-straightedge construction, dynamic geometry demonstrations and automatic theorem proving. Ulli Kortenkamp and Jürgen Richter-Gebert, ETH Zurich.
Escher in the classroom, Jill Britton.
Ephraim Fithian's geometry web page. Teaching activities, test previews, and some Macintosh game software.
Geometry and the Imagination in Minneapolis. Notes from a workshop led by Conway, Doyle, Gilman, and Thurston. Includes several sections on polyhedra, knots, and symmetry groups.
Geometry turned on -- making geometry dynamic. A book on the use of interactive software in teaching.
GeoProof interactive geometry software including automated theorem proving methods.
High school buckyball art. Kerry Stefancyk, Allison Cahill, and Jessica Smith make polyhedral models out of stained glass.
Investigating Patterns: Symmetry and Tessellations. Companion site to a middle school text by Jill Britton, with links to many other web sites involving symmetry or tiling.
Isotiles, workbook on the shapes that can be formed by combining isosceles triangles with side lengths in the golden ratio.
Jacqui's Polyomino Workshop. Activities associated with polyominoes, aimed at the level of primary (or elementary) school mathematics.
M203 Cabri Page. Wilson Stothers explains the geometry of conic sections using the Cabri-géomètre dynamic geometry software system.
Manipula Math with Java. Interactive applets to help students grasp the meaning of mathematical ideas.
Math Made Easy: Geometry interactive video supplemental learning materials.
Measurement sample. Ed Dickey advocates teaching about sphere packings and kissing numbers to high school students as part of a teaching strategy involving manipulative devices.
Non-Euclidean games implemented in Shockwave by students in an advanced high school geometry class: projective-plane asteroids, hyperbolic double-torus minesweeper, and cubical fruitarian snake.
Non-Euclidean geometry with LOGO. A project at Cardiff, Wales, for using the LOGO programming language to help mathematics students visualise non-Euclidean geometry.
Occurrence of the conics. Jill Britton explains how the different conic curves can all be formed by slicing the same cone at different angles, and finds many examples of them in technology and nature.
Origami: a study in symmetry. M. Johnson and B. Beug, Capital H.S.
PolygonPat Australian school program involving coloring in geometric patterns in glazed terracotta.
Polyhedra pastimes, links to teaching activities collected by J. Britton.
Polytopia CD-ROMs on tessellations, polyhedra, honycombs, and polytopes.
A teacher's guide to building the icosahedron as a class project.
Virtual Image, makers of CD-ROMS of ray-traced mathematical animation.
Wingeom, freeware Windows geometric construction software.