It may have much less to do with facility than you'd like to believe. And conversely the ability to explicate your drawing may make for fascinating commentary but it won't make the drawing any better. Resist the temptation to rationalize your product. This is not a paint by number course. There are no prescriptions for great painting just pitfalls to dodge.
Class is centered on the painting studio and it's practices.
Demonstrations and slide lectures set the stage for each segment and correspond to each painting or set of paintings. Expect me to work on your canvas. Don't be offended, don't take it personally, this is not your life's work, yet. Expect to work in class and out. Painting in class is the major emphasis but is not the only effort required of you.