Secure computer-implemented execution and evaluation of programming assignments for on demand courses

A computer system includes a course repository and a server. The course repository includes a video of an online course, an instructor provided output for a programming assignment associated with the online course, and a submission script for generating student provided output for the programming assignment. The server includes a submission module that receives and verifies the student provided output for the programming assignment. The server further includes one or more built-in grader applications that compare the student provided output with the instructor provided output to determine a grade for the programming assignment.