The author notes that teachers who continually require students to sit still and stop talking apparently prefer to teach a grove of trees rather than a classroom full of students. School environments should be designed to enhance the development of student brains -- and student brains are about movement, not motionless stagnation. 21st century movement involves more than physical movement, since it now encompasses cyberspace movement and status shifts, and it's integral to the arts and humanities -- and probably to a lot of other exciting things that are awaiting discovery.