Dunbar's number- 150- is the largest number in which groups of humans can maintain stable social relationships. This is the number of students on campus at any quarter at SEED Academy.
Reading this in Gladwell's book was confirming. Envisioning SEED Academy, we want to have four sections of 10-12 students per grade level. Therefore the projected size of the 9-12 program at SEED academy is roughly 200. While at first this seems to have overshot Dunbar's number and Gladwell's finding, at any given quarter, 50 of the students will be off-campus in the Experiential Program. This leaves 150 students on campus.
Therefore, in a way by happenstance, we have envisioned a school size that will, according to Malcolm Gladwell, operate at maximum capacity without losing stable relationships.