[pdm55]

A suggestion: I enjoyed one short online computer course I studied, because we were given other students' submissions to assess. I recall using both my own code and the code of another student to suggest improvements in a third student's code. I am talking mainly about small tasks such as coding a function.

To me this is just formalising what students do anyway: namely, help each other understand and complete tasks in a course. The difference is that the instructor is actively giving students access to other students' code. I found the process motivated me to get stuck into a task, rather than leaving it to the last minute.