Reference website for kids and teens
James Barrat's numeracy and literacy games (even has links to French flashcards)
What's seven times eight? How about eight times eight? Six times nine? I'd love to sit here all day but I think I have laundry to do. It's common knowledge that computers are very good at repetitive tasks. They simply never tire. Which makes them perfect
A+ Math Flashcards earns its grade with a large selection of Java and non-Java flashcards covering fifteen subjects from addition and counting money to algebra and geometric areas.
Options abound at Allmath Flashcards.
Although these flashcards only cover the basic operands (addition, subtraction, multiplication and division), you can advance to harder problems because Flashcards for Kids allows you to specify a level of complexity and to set the size of the numbers up
Quia is a treasure trove of more than thirty math activities each of which includes flashcards and a Concentration-style matching game.