In a number of courses I've taken and/or am familiar with, homework "grades" are basically a participation/study incentive, but actually completing the assignme

In a number of courses I've taken and/or am familiar with, homework "grades" are basically a participation/study incentive, but actually completing the assignments yourself is highly recommended if you want to pass the in-person exams which the course grade is actually based on. In other courses, problem sets aren't graded and solutions are provided the next week for self-assessment (often with a discussion session to explain the solutions.)