In ancient Greek education, textbooks were an integral part of the acculturation process of what was in many cases (especially in Egypt) a culturally and ethnically diverse student body. School manuals in antiquity very often took the form of gnômologia, i.e. anthologies of gnomic sayings, and were used, among other things, as chrestomathies to improve reading and writing skills. Traces of gnômologia have been identified as early as the third century B.C., and it may even be that comparable manuals were already in use by sophists in the fifth century B.C.
Possibly the best-known of these gnômologia is the so-called Sententiae Menandri (Greek: Menandrou Gnômai Monostikhoi), or …
Liapis, Vaios. "Sententiae Menandri [Maxims of Menander]". The Literary Encyclopedia. First published 16 December 2008
[http://www.litencyc.com/php/stopics.php?rec=true&UID=5763, accessed 22 February 2017.]