Shelby is in a college course for half the day and then goes to high school. what program is she in?

The name of the program she is in is DUAL CREDIT.
Dual credit program is a type of educational program which allows students which are still in the secondary schools [high school] to take college subjects that count toward both levels. Students participating in dual classes usually receive college credits for specific courses offered at their secondary school. Dual Credit programs are usually approve by the ministry of Health.