Any time he had the chromebook out, he just played webgames. Not an exaggeration, he would go back on task when the teacher corrected then switch tabs the moment the teacher was not looking over his shoulder. I told the teacher to take the chromebook away if he did that and the teacher said "but then he can't do the assignment." The obvious reply was "he also can't do the assignment if he's playing games on the chromebook" but that somehow didn't compute.
We finally got him a plan under section 504 of the ADA that stated if he was off-task on the chromebook, then it must be removed. The teacher ignored this. We complained. The teacher still ignored it. We paid a lawyer to draft a scary sounding letter and the teacher finally complied. We sent his younger sibling to a private school.