designed to teach people something, especially a moral lesson (Oxford)
2. intended to teach, especially in a way that is too determined or eager, and often fixed and unwilling to change (Cambridge)
The didactic teacher-led approach is no longer fashionable. (Oxford)
Children’s books possess a practical, didactic purpose – to instill a love for reading. (Cambridge)
didactic teacher-led approach
didactic purpose
Enlightening
Moralizing
Unenlightened
Ignorant
Didactically