I don't know if this is what you need, but you decide. Here's a grammar book that might be appropriate for your Intermediate Level class. ISBN Number: 9781-5249-627-08. The book title-Beginner English Grammar Guide for English as a Second Language Students. You can order it from KindallHunt online store-kindallhunt.com. The book is sufficient to use for a single student or as a supporting material for a stand-alone English Grammar Class-for adult ESL students. Enjoy your students.