We were very clear with our kids. We were funding four years of college studies during the regular academic years and no more. One kid did take a summer class which the kid payed for.
I think one thing that is key…students need to be aware of when class registration takes place. They need to work with an advisor. They need to know their course sequences. They need to be willing to reach out to professors with full classes because sometimes they will add additional students.
The kids need to pass all of their courses.