This is a twenty minute behavior system. This is something that I've had in place in my classroom this past year for several students. They can pick and choose their goal to work for. This is an amazing resource that can work through K-8th grade I would think.
The best thing about this is that is completely editable. You can change the intervals of time to what works for your students needs. You can change the goals, the resource/lunch times. This is just a base for you to work on.
My suggestion to you would to be laminate it and use it with a dry erase marker.