Technology is a great tool for education. It can be overused and misused, but I think that when used correctly is helps so much! Our children are growing and learning in a different world than we are, and I think it is important for them to learn to use technology. I also think that we need to raise a discerning generation that is able to check the sources for accuracy.
Here are a couple of the websites that my kids love to play on when they have computer time, the best is that not only are they educational but they are free too :)
You can pick a subject and practice on grade-level skills in many subjects.