And when classes come in with children who are just a few years older, 11, 12, I felt that I sometimes already had trouble in reaching them like that.
Και όταν έμπαιναν τάξεις με παιδιά λίγο μεγαλύτερα, 11 ή 12 χρονών,  ένιωθα ότι δυσκολευόμουν να τα πλησιάσω μ' αυτόν τον τρόπο.