"Unifying Themes for Undergraduate Math Online"
by Bob Palais, Andrej Cherkaev and Elena Cherkaev
Abstract of NSF proposal
Samples
Rotation and complex numbers
Optimization
Summation of powers
Hide and seek game
Visual Integration (by Jim Carlson)
Microstructures
A minimax game
Platonic solids and volume
A hyperguide: Relationships among topics
Microstructures in Nature
Optimal holes in a plane
The Geometry of Perspective Drawing
by Andrejs Treibergs
Just the animations
Sine and Cosine
Summation of Powers
The Rotation Formula
Mathematicians expand their worlds
.
....
and