The analogous colors on the color wheel -- while I had the concept, I had not known the terminology. And some of the descriptions of line; they made sense but I hadn't thought of them that way. Also, I hadn't known that line is a person-made concept.
What was review?
The texture and form ideas.
How can you apply these concepts to a content area that you currently teach?
I teach K-5 general music, and form is often an area we focus on. Color relates to each musical instrument's tonality; we often refer to instrument tone color. I am looking forward to learning more about how to teach connections between visual arts and music.