Letting them group themselves by the subjects they choose belongs in high school. Real Middle Schools do not have many self-contained classrooms or departments like math or science. Interest-based Activities Middle Schools do not require that everyone do everything. Nor do they restrict the activities to participation by those who have special abilities, as in high school interscholastic sports. In the Middle School everyone who wants to be involved can be, whether it is intramural or interscholastic sports, or other special interest a activities.
Interested participation is the key.
Rewards are not distributed just to those students whose earlier maturation or abilities allow them to dominate their peers. We are not a feeder program for the secondary school.