100 Level Courses:
Students new to philosophy should feel comfortable enrolling in any of the entry-level courses numbered in the 100s or 200s. 

200 Level Courses:
200-level courses usually have a narrower focus than 100-level ones—but all are equally accessible to anyone without any prior introduction to philosophy. 

300 Level Courses:
Courses in the 300s are somewhat more advanced, typically assuming a previous course in philosophy, and those numbered 360 through 369 usually concentrate on philosophical movements or figures.

400 Level Courses:
Courses in the 400s are seminars and have restricted enrollments, a two-course prerequisite, and are more narrowly focused.

Tags:  Philosophy Major