However, the semester is approximately 16 - 20 weeks long and you'll have to maintain and complete your studies within semester time frame. Check further requirements on the computer requirements page. The group discussions resemble a round-table type discussion, where you review the previous postings on a particular topic or a new one posted by the instructor, and where you post your responsive comments. Each entry is posted for students to read and respond. A course takes approximately 16 - 20 weeks to complete.
Some courses have shorter sessions.
It is expected that you will complete a course within this time frame. Within the course, you'll have various deadlines for assignments and a schedule for exams. So, although you can work at your own time, at your own place, you will have requirements for timely completion of assignments and exams. An extension to complete a course requires permission from your instructor. In some cases, an extension may prevent you from taking the next sequence of courses.