Answer:
Young pupils were taught all sorts of pseudoscience that justified the racist beliefes of the Nazi Regime about the supposed superiority of the aryan race.
Among the kind of things that were taught in Nazi Schools we have:
Social-darwinism, that applies Darwin's theories about biological evolution, were applied in social context to conclude that some "human races" were superior to others, and as result, the inferior races should perish, or be exterminated.
The pseudoscience of phrenology, which attempts at determining human characteristics based on the bone anatomy of the different "human races".