Course level numbers are structured as follows:
| 100–199 | Intended primarily for freshmen |
| 200–299 | Intended primarily for sophomores |
| 300–399 | Intended primarily for juniors |
| 400–499 | Intended primarily for seniors |
| 500–599 | Intended for advanced undergraduates and graduate students; these courses are not open to freshman and sophomores. |
| 600–749 | Restricted to students classified as graduate students |
| 750–799 | Restricted to students admitted to doctoral programs |