Interactive Tests  Ron Knott
http://www.ronknott.com/MEI/
Ron Knott has begun producing Mathematics A and AS Level tests for the independent UK curriculum development body, Mathematics in Education and Industry. The webbased format of the tests let you view a problem and then
 choose an answer from a multiple choice window
 request feedback
 try again
 view the answer
 view a model solution that fully explains the answer
Knott's tests mark solutions "intelligently"  they accept "sqrt(3)/2" or "0.8660"  and change the question on the topic of the page randomly.
The topics that Knott offers include:
 Powers and Logarithms
 Graphs
 Sequences and Series
 Review of Algebra
 Simultaneous Equations
 Solving Inequalities
 Coordinate Geometry
 Trigonometry
 Polynomials
 Differential Equations
 Complex Numbers
 Vectors
 Matrices
 Mechanics
 Statistics
Zome  Educators
http://www.zometool.com/educators.html
Zome is a precisionmolded ballandstick construction system that "models spatial structures representing hyperspaces of up to 61 dimensions, geodesic spaceframe structures, molecular models, including quasicrystals and Fullerenes."
The Zome website is organized into the following sections:
 Learn about Zome
Overview
InDepth
 Zome in Schools
Benefits for Students
Outreach Program
 Teaching with Zome
Zome Teaches...
Which Kits to Use
Magic of Bubbles
Zome Geometry
Lesson Plans, free to download in PDF format
Challenge Cards, free to download in PDF format
 Teaching Products
Literature
Kits & Bundles
 Educator Snapshots
George Hart
R.F. Tennant, Ph.D.
Helmer Aslaksen
Henri Picciotto
Ken Berry
 News, Links & More
 Discussion Group
Truncated 120cell
http://mathforum.org/pcmi/hstp/sum2007/photos/zome.120.html
One of the activities at this summer's Secondary School Teachers Program in the Park City Mathematics Institute was the construction of a truncated 120cell using Zomes. View both an explanation of the mathematics and photos of the construction.
Mathgrad Podcast
http://www.mathgrad.com/
One of the goals of Mathgrad Podcast is to provide a place
"...to discuss the mathematics behind many real life topics in
a way that even the worst mathphobe will gain some insight."
Topics range from the math underlying voting schemes to the
mathematics of loan payments.
Sections include:
 Mathgrad Podcast Archives
 For Mathematics Educators
 Frapper Map
 Listen to Promo
 Contact the Mathgrad
 Leo Laporte Interview
 What's a Podcast?
 Links
 About the Intro Music
 Other Great Podcasts
