Depending on the instructor, the result may be a single kid flunking our or a whole ROOMFUL of kids being slowed to the performance level of the poorest performer in the room. The latter consequence is more common in the K-12 schools. Colleges tend to prefere the "let 'em fail" mode.
They run the big 3 like colleges. Stuy,Brooklyn Tech and Bx science.
I asked her what good would it do if the other children had their education disrupted by the troubled kids? She was adamant that the troubled or slow kids needed to feel wanted. I said, that's fine, but what about all the other children. She just repeated her mantra about not excluding the troubled kids. I gave up.