To add songs to your playlist:
1. Edit your class.
2. Select the List View (bottom Right bulleted list icon)
3. Select "+ Add Song" (at the bottom)
Here's another way to add songs to your playlist:
1. Scroll all the way to the end of the playlist.
The yellow playhead will stop and you'll see +Add a Song:
2. Select Add a Song.
3. Search for a Song by Title.
4. Pick the Song you're looking for, and you're all set!