1) Darling activity from "Crazy for First Grade". Check out her post!
3) Here's a list of books that lend themselves to teaching adjectives.
4) And here's a quick list I made of adjectives categorized by size, appearance, shape, what it's made of, and how it feels. A fun way to use it is to put it in a page protector and hand the student a dry erase marker. Then, grab a bunch of objects with very salient characteristics from this list. Show the student the object and talk about it. Have them circle the applicable adjectives that describe it. Erase and start again! Who doesn't love a little dry erase marker activity?