Oxford American Dictionary Vocabulary Builder: Lessons and activities for English language learners (ELLs) to consolidate and extend vocabulary by Keith S Folse
The Oxford American Dictionary Vocabulary Builder includes 50 lessons, with each lesson focusing on an area of language. It's written by Keith Folse, a vocabulary expert, to use with the Oxford American Dictionary or Oxford Advanced American Dictionary. You can use it for in-class work, or students can use it at home.