Diversity of individuals is definite, though might be oppressed. It is no use for the organizer (e.g. teacher) to be afraid that education/instruction would kill individuality.
Indeed, materials/situation must be given to make diversity appear — no diversity over nothing/empty. In the case of couse/class design (as organization design), sound learning subjects are the most important materials where students' diverse individualities becomes present, released and activated.
In fact, diversity of individuals is just a if-then condition. The better 'if' content (that is, the given) is, the better 'then' content (that is, quality of diversity) is. I know by experience that the most important at course/class design is 'making students learn basics steadily'.
The issue of the relation between diversity of individuals and soundness of the ground should not be misunderstood as balancing diversity with commonness.
