Welcome to M.U.G. Monday, where students master Mechanics, Usage, and Grammar by working together to proofread real-world writing examples. These 19 weekly grammar editing sessions address the most common errors made in middle-school and high-school writing. I've used these lessons on Mondays because I like alliteration (M.U.G. Shot Mondays), but you can use them anytime you want. Most semesters run 18 weeks, but I threw in an extra M.U.G. editing mini-lesson in case you have an extra Monday (or