Verbal Workout (www.verbalworkout.com) is a tremendous resource, particularly for high school teachers (and parents) who want to help students strengthen their vocabulary.
It includes key vocabulary words (esp. SAT words) from many, many commonly-read texts and provides lists (sortable in various ways, such as by chapter or frequency) and quizzes. Moreover, it’s a great source to see lists of commonly-read texts, esp. if you are writing/revising curriculum:
I recommend viewing the two brief (2-4 min.) video tutorials so you can see how to gain maximum benefit from this resource. Then you’ll be on your way!
Many thanks to Jamie Sterlacci at Great Oaks Charter High School in Newark for this lead!