I started Sadie Valeri’s Online Program in May 2016 and I finally finished the basic Classical drawing program. The drawing program consist of learning how to draw the spheres and ellipses perfectly, shading, copying the Bargue plates, and blocking in still life objects. These lessons have been life-changing in my art and had taught me more about drawing more accurately and shading techniques. What was so invaluable are her personal critiques which aid my learning faster and at a very affordable price.
Sadie has a Youtube channel that provides some ideas of her teaching methods.