One of my former students came up to me a few years ago, wanting to know what extra work he could do because he was going to be absent the next day. He said he was going to a seminar on coding. I told him he’d probably learn a lot more in that seminar than he would in a day’s worth of school so he shouldn’t worry about any homework. “Maybe you can write me a Judo Math app one day,” I said.
Two years and thousands of hours of work later….he delivered. It’s called Judo Math: Pathfinders. It’s a free app that is available on both Android and Apple. Download it now and let me know what you think!
Judo Math motivates all students to take responsibility. There are no ability groups, just pacing groups. By the end of each discipline, everyone is a black belt rank, reinforcing the unity of the class. 
www.capjax.com