"word walls"
"working with words"
"word study"
"Four Blocks"
If you're more of a book person, check out Academic Edge on Route 33. They had a very nice Four Blocks Section the last time I was there. If you don't like stores, try amazon.com
Some books to read:

Month by Month Phonics for Third Grade
Classrooms That Words: They Can All Read and Write
I wanted to share my opinion about commercially prepared word wall kits. They are pretty and colorful, however, I have found that they are hard to manage (I can never find the word when I want it) and aren't really tailored to the student's needs. I find it just as easy to type the word in word in 100 size font, print it out and stick it up. You'll save yourself the trouble of organizing all those cards, and $19.95.