This one is a very practical look at the subject:
This one is great in relating the research done on the topic: This is my favorite and is a good balance of research and practice: So what are the experts saying about vocabulary acquisition? For one, we have to learn LOTS of new words! This means lots of multiple exposures to words, what they mean and how to use them.
We learn words related to basal stories we are reading during whole group reading. My students are given the word and a child friendly definition. They must draw the "meaningful illustration" to match the defintion. This is research put into practice. Research indicates that a visualization of a word will help them recall it. We call the pictures the "glue" that cements the word into the mind!
These word cards are then manipulated a lot during that week. Students keep them in vocabulary baggies for the week and take them out to match definitions and then to use them. Lots of sorting goes on here: we can sort them by parts of speech, by number of syllables, into abc order, etc. We always go back to meaning though. Lots of examples of usage...lots of discussion.