Options for teachers to lock iPads

Teachers have been using Apple Classroom to lock iPads if students are misbehaving on them. However, the students have found that if they restart their iPad, the lock clears and they can access it again. Wondering if anyone knows of any other ways for teachers to be able to lock their student’s iPads that doesn’t just clear if a student restarts it. After some testing, I found that if I put it in Lost Mode, that works, but the problem with that is the teachers would need to tell me to do it. I also considered putting a passcode on the device, but the teacher would need to unlock the device for these students each time they use it, and if a student gets locked out, I could see them trying to guess the password too many times and getting locked out for a long period of time. I am looking for tools other than Apple Classroom that teachers could have access to, or any other ideas for how to lock a student out of an iPad and keep them locked until the teacher clears the lock.