I am currently finishing my degree via independent study. Obviously there is a difference between the university level and High school level classes.
I left school 28 years ago to take a job in the Northwest. Now I am trying to finish what I started so long ago. Each class must be completed in one year. Most of the classes I complete in a couple of months, but some take several months.
Independent study classes have their pluses and minuses. I don't have the advantage of study groups, and I don't have easy access to instructors. Usually I don't have a lecture to help with my learning. On the plus side, I can study whenever I have time; but I have to fit my study time between 40 to 60 hours of work per week, church callings, civic responsibilities, and family needs.
Some of my classes are easier than those I took on campus, and some are tougher.