School of the Clever Animals of the Forest

What happened in the forest? All the animals suddenly started rushing to get certificates for their cubs. Of course, none of them know what a certificate means; they only know that they should not leave their cubs in the forest without one! The director of the School of Clever Animals insists that all the schoolchildren learn the same skills. But is that even possible? Imagine a fish in a flying class, or a turtle in a sprinting class.