As a high school math teacher, I would employ Voki for student use. I would allow my students to create their own Voki. Students would then select a mathematical concept of their choosing and would have to teach the concept with their Voki. These would be concepts I had already taught. By the students using their Vokis to teach the concept again, they will demonstrate mastery of the concept. If the students are able to teach a concept through their Voki, they will indeed demonstrate mastery of the concept because being able to teach it is much more difficult than simply applying it to solve a problem. The students would use class time to do this project using the mobile lab that is housed in my classroom.