Drills
Drills are small lessons with only a few bars (often only one) to help you train a specific technique or to get your warmed up.
Drill List
When entering the drills page you’ll be presented with a selection of drills like this:

Drills
A drill opens up to this page:

Drills come in a few differnt types, some like this one want you to play specific notes in a specific order. Others are more challenging and will judge you not only on the note but the timing as well.
At the end of a drill run you’ll be presented with a report on how you did and where you need to improve.
Drills and Lessons
Drills are great to practice on there own but they also form the back bone of Lessons.
Lessons are a selection of tailored drills that give you the skills and techniques needed to play the target piece.