SpellingCity is easily the best site around for Spelling & Vocabulary. A teacher can create word lists and then import then into educational games to help students w/ their Spelling/Vocabulary skills. Also, a teacher can browse through other word lists and find lots of educational resources such as printables and videos. Finally, there are portable apps for Android & iOS to aid in mobile learning.
I highly recommend checking out SpellingCity by clicking here!!!
*SpellingCity is a advertiser of Technology Tidbits.