Some time ago, I did an online course with the MOMA, the Museum of Modern Art in New York. The course I studied was the 'Materials and techniques of post war abstract painting'. My teacher was Corey D'Augustine. He is a curator at the MOMA and it was interesting to pick his brains. His understanding of paint and his interest in process, made him very interesting to learn from. The following videos are from the MOMA and show Corey D'Augustine explaining different art terms.
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Corey D'Augustine: http://www.coreydaugustine.com/