School comes from scholē, 'leisure'. Greeks thought learning was the best use of free time.
Scholē meant free time. For Greeks, the best use of leisure was discussion and learning, so the word moved from 'spare time' to 'lecture' to 'school'.
Ten minutes of Greek on your lunch break? That's scholē the old way.
Learning in short breaks is the original meaning of school: free time well used.
Practice it in Skepsis