| Type | Description | Number of courses |
|---|
| Lecture Supplements | Instructor-created materials (audio, video, enhanced audio) that extend topics covered in lecture. These include mock-radio shows, case studies, interviews with experts, introduction or elaboration of concepts covered in lecture. | 48 |
| Lectures | Audio or video recordings of in-class lectures or video, audio, or enhanced virtual lectures delivered outside class time | 15 |
| Sounds | Audio recordings of bird songs, lung/heart sounds, orchestra rehearsals, musical performance | 11 |
| Student Presentations | Audio or enhanced presentations created and recorded by students | 5 |
| Other | Other types of audio files delivered as a course podcast | 10 |