What word in French would you use for attend, in the sense "attend the class"? Attendre seems to mean to wait; dictionary offers:
but I guess only some of them are normally used in this context?
To follow up on the 3 "correct" answers, there are some differences in the 3 proposed translations
assister à un cours : you are going to attend the class at a specific date. It not mean that you are attending the class for a whole semester.
suivre un cours : here you are attending the class which lasts for several sessions
participer à un cours / prendre part à un cours : as @Shlublu noted, active attendance is implied. Nothing implied about the number of sessions.