wow...that text was ..lets say powerfull.
so its not allowed to send out a child if hes disturbing? how about simply putting in journal F for a "leassons work"...after some 3 F's he should shut up, dont you think?
for us teachers simply said "if you dont feel like learning, simply walk out. i wont put any bad grades, simply show up for exams." thats it - and it worked...sometimes we acutally said that "yea. we will probably go, we know this material that you are teaching today so in order not to get bored and mess with others we are leaving" and simply went outside.
best thing was that there were not any cases of skipping all the leasons because after few tries they uderstood that they are falling behind fast.
P.S music..yea we also lost our minds when we had it...sooo boring. we were mosnters at music leassons. at one time our teacher actually announced war against our class....yeap. and we just kept loughing..horrible