Lessons and Sparring Sessions are broken down into multiple sub-themes, all interconnected in our growing database, allowing for navigation back and forth between theory and practice. For example: If you are watching Marcelo teach a way of taking the back — you can hit one button and watch every moment in our archive database in which Marcelo has done that while rolling. Or, if you are watching Marcelo spar and notice a transition into X-Guard that you'd like to see broken down, you can hit one button and watch Marcelo teach that technique in class.