Do your students write "do again" instead of "redo"? Do they know that "un-" means "not," but still write "not happy" instead of "unhappy"? Do they add "re-" to every word – even when it doesn't make sense? You're not alone. Prefixes seem simple at first. Just add two or three letters to the beginning of a word, and you change the meaning. But third graders often struggle to know which prefix to use, when to use it, and how to spell the new word correctly. Without varied, hands-on practice, they