How do I decide the order in which to take courses?
Use the Course Number as a General Guide
Courses numbered in the 100s and 200s are appropriate for freshmen and sophomores. This doesn’t mean they are necessarily easy—just that they are courses to consider taking during your first two years. Courses in the 300s and 400s have more prerequisites, are more specialized, and are more appropriate for advanced students. This doesn’t mean a sophomore shouldn’t take a 300-level course or a senior shouldn’t take a 200 level course, but the numbering does give a general indication about the amount of background expected. Courses in the 500s are “dual-level” (undergraduate/graduate) and require at least junior standing. Don’t be afraid to try one of these courses. If you have concerns about what will be required, talk with the instructor.
First Take Courses that are Prerequisites for Other Courses
PSY 120, PSY 201, and PSY 203 should all be taken by end of the first semester of your junior and, preferably, by the end of your sophomore year. Note, too, that you must pass MA 153 with a grade of C- or higher (or MA 152 with an A or B) before you will be allowed to take PSY 201.
Take the Advanced Class Soon After Taking its Prerequisites
For example, once you have completed MA 153, go ahead and take PSY 201 before your newly acquired mathematics skills have gotten rusty. Then take PSY 203 before you’ve had time to forget your statistical knowledge.