The system does not restrict your ability to take courses in whatever order you please. Of course, we recommend you take the courses in order, as the later courses build on concepts taught in the earlier courses. Furthermore, in order to achieve the Certificate of Completion, you must complete all 16 of the Core Courses. With all of that said, many advanced members skip the earlier courses (e.g. Direct Cap Method to Valuing Real Estate or Calculating Key Metrics), preferring to focus on the more advanced concepts.