In the late 50s I was involved (as an elementary student) in some kind of experimental math program. I was living in southern Illinois at the time. It must have been involved with a University in the area. Every so often a visiting "older man" would come to work with us in math and see how we were doing. I think we called him "Dr." something. The main tool of the program was called a Numberaid. It looked rather like an abacus.
Has anyone ever heard of this program or know what happened to it? I'm just curious.
Rosemary beck Resource Math Teacher/Technology coordinator Holaway elementary School Tucson AZ email@example.com