High school, students stay on lot mod?

[Rosario Blackthorne]

hello, I like the high school and i've the mod so about 40 students are on high school but i'm missing one thing, as all of them are leaving once the school day is over, only rare situation that someones stays. 
At the start of the day students appear and they go to gym, play basketball, swim, study on pc, talk etc. so I would like to ask if you know about any mod that could add this option after school is over for the day and some students maybe half of them, should stay and do some acitivties? Would make it a bit interesting for gameplay