Lecciones impartidas por Mark Crowder
| Nombre de la Lección | Curso |
|---|---|
| Vocal Exercises | 2017 Vocals |
| Basic Singing Concepts | 2018 Vocals |
| Dealing with Hoarseness | 2018 Vocals |
| Feeling and Emotion | 2018 Vocals |
| Runs and Trills | 2018 Vocals |
| Breathing II | 2016 Vocals |
| Health and Maintenance | 2016 Vocals |
| Vocal Exercises and Song Tutorial | 2016 Vocals |
| Vocal Principles | 2016 Vocals |
| Vocal Runs | 2016 Vocals |