The issue for my DS really started right before last Christmas but the teacher let it go because she thought it was close to the holidays so the kids were getting anxious. However, it continued after they were back from winter break and that's when the music teacher contacted me. I checked with her a few times after our phone conversation to see how he was doing. We tried to remind him how he should behave in school. We also warned him if he's being disrespectful again, we would take his iPad away for 2 weeks. These seemed working for us.