Monument Brazilian Jiu-Jitsu and Kids Martial Arts school, Brazilian Jiu-Jitsu and Kids Martial Arts school in Monument, CO. Academy Martial Arts offers adult BJJ and children's classes taught by a Brazilian Jiu-Jitsu (BJJ) and Taekwondo Black Belt. We also have Mixed Martial Arts - MMA, Taekwondo, Kickboxing-Fitness, as well as FREE Self-Defense classes. Our kids program combines several martial arts to make it the most practical for your child, while teaching character development skills.