The reasons behind this opposition are numerous, value laden, and often very political.
I will not use this opportunity to defend the inclusion of all levels in one learning community, but will remind those of you who are unsure or unconvinced to take the opportunity to read from the reading list that has been provided.
It's very easy to agree that we should strive to meet each child's individual learning needs.
The tracked groups still included students with wide ranges of abilities, interests, past educational experiences, and curriculums.
I suspect that some of these teachers, educated during the heyday of John Dewey, would have found our debates about homogeneous/ heterogeneous classes silly. That is the ethical, and moral, and in some cases legal, imperative. And for efficiency, let's label this kind of teaching differentiating your instruction.