"Something that technology allows for is a really easy way to practice skills. Although using technology for ONLY drill and practice is definitely not a good thing, using it for quick bursts of practice can be really beneficial to learners.
Imagine anything you used flashcards to practice before. Technology can enhance that kind of practice with things like progress monitoring, content connections, and even gamification. It's probably not great to look for a site or tool that imitates flashcards exactly, I can't imagine any benefit to it besides maybe ease of setting up or not losing the cards. If you can add some progress monitoring that allows for goal setting, now we're talking.
A popular site among our elementary math teachers is Xtramath.org. It's a site with a very straightforward goal- to make math facts practice better. From their about page:
"Our goal is to develop effective, efficient, adaptive, and intrinsically rewarding supplemental math activities."
It adds goal setting, challenges, progress monitoring, and some game elements to math facts practice. What I like about it too is that it isn't too flashy. The math is there and it's hard work, but rewarding. Kids can work on all four operations and test in to their "just right" practice level. It's a tool our teachers really enjoy, and a great example of how a practice website should be.
Instructional Technology Coach