This story sheds some light:
http://www.espn.com/mens-college-basketball/story/_/id/17945257/ben-simmons-blasts-messed-ncaa-film-says-players-get-nothing
(Simmons)...was also benched for four-plus minutes of a conference matchup for missing a class.
In one scene, filmed last season, Simmons said he had no intention of attending class after he became eligible for the second semester.
"I got B's and C's; I'm not going to class next semester because I don't need to," Simmons said. "... I'm here to play, I'm not here to go to school."
Collegiate athletes who are eligible by the end of first semester can also compete in the second semester, even if their academics slip. Simmons admits he stopped caring about class.
"[Coach] Jones said, 'We need to make up a punishment if you miss another class,'" Simmons said. "I missed my next class about preparing for better study habits. I'm going to the NBA next season. Why bull---- if it's not going to help me?"