Differential Tuition: A tuition setting strategy whereby an institution charges a higher per-credit-hour rate for more expensive programs. This cost is often set after students accumulate are certain amount of hours.
For Example, Colorado State University:
Differential tuition is tuition charged to students according to the specific courses they take after they have reached 60 credit hours. Those 60 credits include any Concurrent Enrollment (CE) credits taken off campus or at stem and/or AP or IB credits the student transferred from high school coursework.