Veteran industrial designer Kelly Custer, the founder of design studio Knack, is already a pro sketcher; indeed, she was the instructor of Offsite's Real World Sketching class. But as evidence of the power of continuing education, even Custer found a helpful design sketching course that helped her transition to digital while flexing some sketch muscles.

"In pursuit of sketching faster, looser, and better, I took Hudson Rio's 'Intro to Digital Design Sketching' course," Custer writes. "HOLY COW was it helpful! Highly recommend. It gave me the perfect opportunity to do exactly that, all while getting comfortable using (new to me) Sketchbook Pro.

"I took the assigned homework as an opportunity to sketch 5 of my favorite products from home:"

The class Custer's referring to, "Intro to Digital Design Sketching," is a 7-module online course with over 5 hours of instructional videos, taught by industrial designer Hudson Rio.

Here's Rio breaking down what the course covers:

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You may recognize Rio's name from his copious library of sketch videos.

If you're interested in the course, you can sign up here.