Do you find that you have to replace your Adafruit circuits every year or every other year? I haven’t used mine yet, but we are budgeting for next school year.
I can only speak for myself, but as long as the kids are careful with them, they are pretty durable. In the years I’ve used them, I haven’t had to replace any, but I have had to update the firmware occasionally.
I know some teachers have seen them walk out in student pockets, but if you have an effective storage solution (I use these) and procedures for distributing and collecting them, they will last quite a while.