Hi all! So, I am going into my third year teaching kindergarten. I'm at a very low SES school. Most of my students have had no formal education before coming into K. This is problematic in that students struggle to sit in their chairs. I do not expect perfection but the students crawl on top of the desks, lean waaaaay back despite many reminders/consequences, are constantly out of their seats, or are asleep on their desks. I don't feel that it is primarily a behavioral management issue (the students are generally quiet, participate in the lesson, etc.), but just a developmental issue. So I'm considering alternative seating options that are more engaging. I've done quite a bit of reading on incorporating exercise balls in the classroom and that is what I'm leaning toward right now. Cons to the exercise balls seem to be primarily that they roll around. There are other, more sophisticated seating options that don't roll, but these are VERY pricey (like $60-100/seat), and I have a donor willing to invest in some relatively inexpensive alternative seating. Other than the exercise balls, I'm considering the inflatable seat disks or these things called "donut exercise balls," which are like exercise balls that are squished down in the middle (they look like donuts ). I just don't know which option is the best :/ The yoga ball requires core muscle use to stay upright, which is supposed to be a benefit of it, and I'm not sure if the donut/seat pads do the same. Does anyone have experience using any of these? Any tips/tricks? I would like to purchase a classroom set of one of the options, not use multiple things. Thanks in advance!