GrammarFlip is a website that provides over 60 grammar lessons to help students learn at their own pace. Each lesson includes instructional videos, presentations, practice exercises with feedback, and writing activities. It benefits teachers by freeing up class time and allowing them to monitor individual student progress. Teachers receive student progress reports, writing pads for student interaction, and 150 free student accounts. Students learn parts of speech, mechanics, and become better writers through fun and interactive lessons.