Texas Instruments' The Little Professor
Here is a short demonstration of The Little Professor math instruction calculator. Instead of a traditional calculator, The Little Professor gives math problems for the user to solve. Four operations are available: addition, subtraction, multiplication, and division. This is a 1976 version. TI still sells a solar version today.
Thanks to Kaleidoscope Antiques in Monrovia, CA.
I’m also trying the LifeCam HD-3000 webcam from Microsoft, and using it as a video camera. I tried to get the display to be clear as possible.