Grammar plagues me as a teacher. I mean, split infinitives? Anyone? Bueller? When Words Collide helps. This is one of the most well-written guides to style and grammar. Without long, overwrought explanation, Kessler dives right into examples. Her chapter on passive voice (worst rookie mistake ever) is thorough, to-the-point, and clear enough to use in a 9th grade classroom. Hooray! Grammar is rarely fun (except for me), and this book takes some of the monotony out of teaching the difficult rules (dangling modifiers, anyone)