A great resource for vocabulary instruction- 100 Words Every Middle Schooler Should Know by American Heritage Dictionaries. In my classroom we use it as a challenge. I introduce a word a day and every 10 words there is a quiz. Each word has the definition, part of speech, and a sentence.
The quizzes are via Smart Response but could also be done pencil and paper.
The kids have really taken on this challenge, I am proud of them!
*This is a PDF of the Powerpoint. The editable powerpoint is also available