"She was very nice, friendly and chatting with her classmates," a source told E! News of the actress.
The She's The Man star was supposedly going to be a fashion design major, but decided to go for merchandise product development instead. She is allegedly enrolled part-time for the winter quarter.
The 27-year-old actress was seen checking out the FIDM O.C. campus back in December.
Bynes has been spending a lot of time with her parents since she completed her rehabilitation at a Malibu treatment facility in early December. Since her release, she's been seen walking her dog, at Disneyland and grocery shopping with her parents a few times.
Bynes recently agreed to see a counselor twice a week for the next six months as part of a deal to settle her New York bong-tossing case.
2014: The Year in Music [PHOTOS]