Yes! (see below) However, Dr. Shormann does not recommend skipping any assignments even if your student has learned the concept in a previous course. The review builds auto-recall and fluency which is required to build on these concepts when learning new ones. It also raises scores on standardized tests like college entrance exams and CLEP & AP exams. See also: Can I Skip the Review Lessons?
How to Skip an Assignment:
While there are restrictions to ensure a student does not accidentally skip one, you can skip by opening the assignment and immediately submitting it. There is no need to answer any of the questions.
At the end of the course, use the "Running Average" as your Final Grade. How to View Grades in the Gradebook
Alternatively, you can purchase a Family Grading Subscription, which allows you to change grades and reset assignments. This means on the lessons you want to skip, you can put a grade in the grade book which would then allow you to open the next assignment.