| Clue | Source | Date |
|---|---|---|
| Mandatory: Abbr. | Premier Sunday | 04 Oct 2026 |
| Like some coll. courses | ||
| Like some coll. courses | LA Times Daily | 15 Apr 2019 |
| Like some coll. courses | ||
| Mandatory: Abbr | New York Times | 22 Nov 2017 |
| Mandatory: Abbr. | ||
| Necessary: Abbr | Premier Sunday | 11 Sep 2016 |
| Not opt | LA Times Daily | 16 Jul 2016 |
| Not opt. | ||
| Not optional: Abbr. | ||
| Like some coll. courses | ||
| Necessary (abbr.) | ||
| Not opt. | ||
| Necessary: Abbr. | ||
| Like core courses: Abbr. | ||
| Like core courses: Abbr. | ||
| Necessary: Abbr. | ||
| Necessary: Abbr. | ||
| Not optional: Abbr. | ||
| Mandatory: Abbr. | ||
| Not opt. | ||
| Like some courses: Abbr. | ||
| Like some courses: Abbr. | ||
| Not opt. | ||
| Not opt. | ||
| Necessary: Abbr. | ||
| Mandatory (abbr.) | ||
| Like some coll. courses | ||
| Needed: Abbr. |