<p>If the kid is adversely impacting other students’ chances to learn, he/she shoud be expelled.NOT as punishment, just to salvage or preserve the learning opportunity for others. If a child or teenager just wants to sit there and do no work but does not create disruptions, let them stay.</p>
<p>If the person is sent home, the parent(s) are much more likely to get involved, as a prior post pointed out.</p>
<p>It does not matter whether they can’t or just won’t, the effect is that they don’t learn and drag other students down.</p>