There are many approaches that one could take to implementing the flipped classroom. One approach is called the “flip-explore” approach.  You might create a screencast (the flip) that gives information to the student, such as what is the definition of the “angles of elevation and depression”.  In class (the explore), the student uses this information to discover how to use it in a real world setting. Sometimes the screencast might be a straight forward description of some mathematical concept and associated problems that they need to practice in class the next day. A second approach is often called the “Explore-flip” approach where students, working in groups at their seats or on the white boards or somewhere on campus, collaborate to discover a mathematical concept (the explore). For homework that night, a screencast (the flip) is assigned summarizing what the students discovered in class.