Sophia Learning
Sophia: Editing Techniques: Checking Your Spelling: Lesson 1
This lesson goes over checking a composition for spelling errors. It is 1 of 2 in the series titled "Editing Techniques: Checking your Spelling." W.9-10.5 Writing Process
Other
Clear Ink/spell Web: Let the Web Decide!
A different type of spell checker, giving results from search engines, not based on dictionary word lists, but on frequency of use on the Web. If you're looking for a word that hasn't become official or want to see whether one...
The Write Place
Literacy Education Online: Using Spell Checkers
This resource gives three pointers for getting the best results from your spell checker.