Animals.
A lot of Germany is overrun by stray kittens, hamsters, ocelots, stoats etc. On the first day of school, children are sent out into the nearby area to collect as many as they can fit in a cone. It marks the entry into local community which educates them and in return they help by catching little animals.
At the end of the day all the animals are released in the school's great hall and the children get to pet them and feed them bits of meat and salad. The next day all the animals will be used to make maths and science cuter to learn. It's proven to be instrumental as to why Germans are typically good at these subjects.