This is what my gym does. After tryout you get but in groups, they don't stick a level to it though. But we are not dumb, we know what group is what lol. The groups then practice for 2 weeks, the coaches have always said it is to see how consistent kids' skills are, see how the new kids receive coaching and corrections, see us conditioning, and get more abt our skill level than any 1 hr tryout can give. From a coaching perspective, it makes sense. From an athlete's perceptive, it causes weeks of stress and anxious feelings about what team you will get.