hypnopedia

noun

hyp·​no·​pe·​dia

variants or chiefly British hypnopaedia

ˌhip-nə-ˈpē-dē-ə 

: instruction of a sleeping person especially by means of recorded lessons

called also sleep-learning, sleep-teaching

hypnopedic adjective

or chiefly British hypnopaedic

-ˈpē-dik