textbook(s) – n. a book about a particular subject that is used in the study of that subject especially in a school

tuition – n. money that is paid to a school for the right to study there

digital – adj. using or characterized by computer technology

author(s) – n. a person who has written something

relevant – adj. relating to a subject in the right way

faculty – n. the group of teachers in a school or college

interactive – adj. designed to respond to the actions and commands of a user

content – n. the ideas, facts, or images that are in a book, article, speech, or movie

course(s) – n. a series of classes about a particular subject in a school