I don't know if they are still doing it, but 12 years ago the University of Maryland had something like this. They had CMSC106 Introduction to C and CMSC107 In

I don't know if they are still doing it, but 12 years ago the University of Maryland had something like this. They had CMSC106 Introduction to C and CMSC107 Introduction to Unix classes that had no credit towards the major, but allowed those interested a gentler introduction to computer science.