Add, subtract and multiplyhttp://www.asymptopia.org/
Multiplication Station will teach your child to add, subtract and multiply...
The new administrator GUI simplifies configuration of number ranges and
operators. The built-in data recorder functionality allows teachers (or
parents) to track student progress and perform quantitative performance
assessment. The built-in countdown timer discourages laziness. The
high-score display encourages friendly competition among students.
Charles B. Cosse