Out student don't have any physics or biology background so it is frustrating to try to set up applications. It doesn't make sense to have two tracks of calculus classes unless it is related to the student's major. Having major-oriented tracks creates problems with switching majors. Random parallel tracks doesn't make sense but could provide students with a choice between two approaches, with a clear policy on switching between them. It is important to decide on a basis for defining tracks.
Possible bases are use of technology, teaching style, and content.