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The grammarflip by GrammarFlip is a comprehensive grammar and writing course for teachers in elementary, middle and high school grades. It can be used with students in traditional classrooms, mixed learning environments, or flipped classroom environments. Its concise and comprehensive video lessons allow students to learn hundreds of grammar and writing concepts at their own speed. There are also self-assessment exercises that provide instant feedback and different question formats use multiple learning modes. Its participation writing prompts can promote student participation, while the writing portal provides instant access to student writing for quick feedback. GrammarFlip is understood that approximately 80% of students who use grammarflip have an average improvement rate of 183% from the baseline diagnostic score to the final assessment.