Teaching and Assessing Writing with the 6-Traits
NWREL 6+1 TRAITS of Writing Rubrics and Definition of Word choice
Specifically Speaking by Christopher Meeks. Good writing and good advice. Meeks provides information about use of detail, metaphor and simile, and active verbs that is very helpful.
Poetic Sense: Sound & Imagery by Christopher Meeks. Good writing and good advice. This overview of the connections between poetry and prose is a wonderful resource for the Word Choice Trait.
Mini Lessons For Word Choice These are lessons for elementary and middle school levels.