chrestomathy
Concise Oxford English Dictionary © 2008 Oxford University Press:
chrestomathy /krɛˈstɒməθi/
▶noun (pl. chrestomathies) formal a selection of passages used to help in learning a language.
– origin C19: from Gk khrēstomatheia, from khrēstos ‘useful’ + -matheia ‘learning’.
'chrestomathy' also found in these Oxford entries:

