Abstract
The lecture on examples of subject matter from botany, mathematics and primary education demonstrates the key importance of formal (school) education. This, unlike everyday, spontaneous concepts, helps the so-called abstraction stroke.
In contrast to the unsubstantiated critique of school teaching, it shows that generalizations occur simultaneously "from below" (with the help of concrete, practical experiences) and "from above" (by inclusion in a network of other general concepts). The emphasis on abstraction is crucial for the autonomy and emancipation of the individual, who thus receives a tool to solve even those tasks that he has not yet encountered in everyday life.
Theoretically, the interpretation is anchored in cultural psychology inspired by Vygotsky.