http://judah-schwartz.net16.net/FunctionSense-home.htm

Judah Schwartz presents this work in progress, an online book on the philosophy of teaching functions in middle and high school algebra. He has come to believe "that approaching algebra through the study of functions using symbolic and graphical representations simultaneously and in parallel from the outset is a pedagogically powerful teaching and learning strategy."

The book is meant as shareware. If you find it of use to you, Schwartz asks that you send him a multiple of pi dollars.

http://whistleralley.com/GSP/perspective/solids.htm

Paul Kunkel has updated his tools for constructing 3D perspective views of polyhedra for Sketchpad 5, including new tools and capabilities. Rotate to view the constructions from any angle, or view the inside of a solid by omitting one face. The constructions may also be exported to HTML.

Kunkel recommends that new users of these tools start with the manual:

http://whistleralley.com/GSP/perspective/perspective.htm

http://www.hpm-americas.org/?p=231

The Americas Section of History and Pedagogy of Mathematics (HPM) is having a West Coast meeting, October 23-24, on the campus of CalTech in Pasadena, CA.

HPM is seeking abstracts for 30-40 minute talks on the history of mathematics, the teaching of mathematics, and the history of teaching mathematics, especially those directly relevant to mathematics classrooms. Submission deadline is September 15.