unit credit system
An educational system where credits are awarded for completing individual units or modules, often used in higher education.
This university has adopted a unit credit system.
単位制 is a broader term for a credit-based system, while 単元制度 specifically refers to a system based on individual learning units or modules.
Compound of 単元 (unit, module) and 制度 (system). The exact historical derivation is uncertain; it is a modern educational term.