The student produced demo program CD2 can be obtained via anonymous ftp at academynet.com. It is in the pub area as is our math manipulative program that can be used to introduce algebraic concepts to 1st graders. Both programs are freeware. Both programs can be used to help reform mathematics education/instruction...one at the secondary level and one at the elementary level. We maintain a repository of demo programs on the Digital Foundation system at 915.590.6336. According to my son, we are only putting up programs that have been rated as 4 or 5 stars.