Flash cards were pretty good math practice. But, they were always the same math problems,
over and over. Lo and behold,  to the rescue! Just select the difficulty level then
click the type of problem you want to practice with, (add, subtract, multiply, and divide) and
JavaScript will give you a problem. And, a built-in score checker grades you along the way!
Great practice for elementary-aged students just learning their math skills, or for anyone
wishing to practice a bit!