In this episode recorded in September but released in December, Matthew and I discuss a few of his projects, music videos, TV shows, and books. His mission is to affect as many people as he can with the joy of doing mathematics in multiple ways. His focus has been upon student representations of concepts. We end up discussing how pop-culture can be leveraged to engage students. For him, knowledge is constructed by students in the doing of mathematics. Finally we look at a couple of organizations he supports “With Math I Can” on Amazon, and “The Global Math Project” sponsored originally by the Mathematical Association of America via James Tanton.