Classroom Salon is free to use for both students and educators and is a great tool for flipped classrooms. Professors can upload course materials in the form of text or video files. Students then can comment on areas of text or video frames that they find helpful, confusing, or intriguing. Classroom Salon aggregates all these annotations to provide insights into student thinking. Educators can use the document and video hotspots to guide their instructional strategies. Classroom Salon can also measure student intangibles based on engagement index, helpful index, thought leadership and consistency.