In English, we often drop the subject of a phrase, such as in these signs: Who are these signs written for? It's really *You, stop* or *You, yield* or *You, be alert for bears* (I'm not doing it). After internalizing a language, we can take hints without explicit instructions. But, to put it politely, math isn't usually well-internalized. Let's get clear about who the "math signs" are referring to.
What’s the essential skill of a cartoonist? Drawing ability? Humor? A deep well of childhood trauma? I’d say it’s an eye for simplification, capturing the essence of an idea.
**Summary:** I'm building a calculus course from the ground-up focused on *permanent intuition*, not the cram-test-forget cycle we've come to expect. Interested? Sign up for the [mailing list](http://betterexplained.com/articles/betterexplained-email-list/) to get news about the pilot, launching early August. The learning principles below will guide its development.