How many of you give tests online?

I just finished grading all of my finals, calculated final grades, and told my particularly obsessive students if they had passed. However, an emerging trend points toward giving tests, posting grades, and otherwise assessing students online (or at least via some sort of spiffy hardware/software combination). Certainly this is taking place at the college level and an increasing number of high schools are also beginning to use instant feedback mechanisms for micro-quizzes and tests.

While many finals may not be conducive to online administration (it's hard for a computer to award partial credit on an essay), there are few things that take up more time than grading. Waiting for grades certainly makes it harder for students to understand their mistakes as well. I have to say that this is one piece of classroom tech I could gladly get behind, but don't have the funding to snag very easily.

This question is particularly addressed to middle and high school teachers since colleges are adopting online and instant feedback test administration pretty rapidly. The question is, how many of you give tests online? If you do, talk back below and let us know how well it works, or what sorts of problems you've had.

[poll id=6]

Enjoy your summer!