One of my favorite ways to differentiate spelling is by having students sing their spelling words. Three, four, five, six, and seven letter words can easily be sung to well-known songs. Here are some students spelling the word cool to the tune of "10 Little Piggies."
The classic "Row, Row, Row Your Boat" can be used to practice a five letter word like world.
Here are the songs I have used:
3 letters: Three Blind Mice
4 letters: 10 Little Piggies
5 letters: Row, Row, Row Your Boat
6 letters: Happy Birthday to You
7 letters: Twinkle Twinkle Little Star
This activity gets students up and out of their seats and gets their brains working! It is especially successful with your students who are music smart.