01
Drawn first
A new object appears as a figure. The definition names something you have already seen.
An open curriculum
The idea first. The notation after.
Clear Concept Commons publishes short mathematics courses. A course stays with one cluster of ideas, draws them until the picture is stable, and only then introduces the notation.
How a course is built
02
One cluster
A course finishes a few ideas completely. It does not try to survey a whole field.
03
Open pages
Every course is a set of ordinary web pages. Read them in the browser. No account is required.
01
Vectors and Matrices
From arrows in the plane to the equation Ax = b. A first course in what linear algebra is about.