Spelling City (Spellingcity.com) is such a great interactive site for making spelling practice fun. Incase you're not familiar with Spelling City I've included a how-to.
Once you've created your lists you'll see a screen like this:
One feature that took me a year to notice is the 'print' button next to several games. It's great for whole group since my classroom only has three computers.
I know this was a really quick run down, but I hope it has helped some.