I finally have my word wall up and running. It's not as fancy as the ones I've looked at online, but it works. I have the words divided into categories by unit on the bulletin board. The kids have an alphabetical "portable word wall" in their S.T.A.R. notebooks with the same words. They put the page numbers beside each entry so they can find the notes or definition of that word in their notebooks - kind of like an index.
Words are from Marzano's Building Academic Vocabulary
Portable word wall in the back of the S.T.A.R. notebook (from Cheryl Sigmon's website)