Kids Spell is a really nice site for spelling words. What I like about this site is that the teacher can type in the spelling words and then copy the URL. Then the teacher can share the URL with their students. When the students go to the URL, they can play games and activities with their spelling words. If the teacher bookmarks the URL, the saved spelling list and games will always be there.
If you would like to see the list and games I created for our students click here. This takes you to our Weebly site.
Another great site to practice and play games with spelling words is SpellingCity.com