Continuity in education
The same educational system, based on the edubba ‘tablet-house’ schools, was maintained for at least two millennia, since sign lists to teach the symbols, in the same order, have been found in the Sumerian city of Uruk dating from the third millennium and Ashurbanipal’s library in the Assyrian capital Nineveh from the mid-seventh century BC.
Nicholas Ostler, Empires of the Word (link)