The third idea is that we might teach better if we knew more about learning styles and the brain. The primary belief is that the Brain wants to learn, and will unless something gets in it's way. This is called Brain Based Learning. Click here for more information. Very few people have ever seen their own brain, but we can look at different brains to see the characteristics and functions of a normal brain, and disabilities caused when the brain malfunctions.
Scientists believe that the human brain has evolved.
They believe this because successive levels of species of animals have similar parts to their brain. Each successive layer above this primitive center adds functionality and complexity to the individual organism or species and it's behavior. At the top of the evolutionary development of humans and other primates, is the Cerebral Cortex. This split brain research leads to some interesting ideas. There are several other sites to explore split-brain research, including this one here.