spelling game... Excellent for a little white board challenge! Love this! Will help with vocabulary... I could also use this for Word Wall inductions-- have the students submit new words that they have created and learn them! :) its endless!
Boggle- This is by far the most popular in my room. I got this amazing activity from Create-Teach-Share and my kids go bananas for it. I just change the letters weekly to reflect our spelling pattern focus and they go on a word making frenzy. LOVE it!
3rd Grade's a Hoot: Daily 5 Work on Words... and freebies!