1. Computer algebra systems
Demonstrations in geometry and algebra
Especially the interactive possibilities. The Mathematica demonstration project has
hundreds of examples. But many of them are too complicated to be used as templates
for simple things. 



Examples:
 Geometry
 Gas
 Vectors

2 Graphing Calculators
Graphing calculators are self contained applications.
They are cheap and do not need much time to learn. They are
ideal for the classroom demonstrations. 



Examples:
 Exhibit (2007)
 Examples
 Grapher examples

3. Applets
Java applets, are an older technology and so quite mature.
Java is now open source. 



Examples:
 Planimeter (2002)
 Line integral (2002)
 Chirikov (1999)

4. Flash
Flash is a newer technology, which needs still a commercial
program to develop. 



Examples:
 Curl/Div (2004)
 Torus (2004)
 Spiders

4. Javascript
A robust technology without plugins which
works even on the iphone. 



Examples:
 Online Quiz (2003)
 Javascript dynamics (1999)
 GaussJordan (2001)

5. Multimedia
Useful to lighten up a lecture or review
or a website. The presentation itself. 



Examples:
 Review (2009)
 Data fitting (2007)
 Barbie (1006)

6. Graphics
One or two pointers how to produce graphics for
handouts or overheads or worksheets. 



Examples:
 Povray drill
 Povray gear
 Marblebook

7. Discussion:
There is a plethora of possibilities. There is almost
too much choice. Despite the dangers and risks, there can be a lot of benefits. 



Examples:
 pitfalls in teaching
 slides
 slides [PDF]
