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I have taken numerous psychology classes where we have learned tons about the brain.  But, it was never presented to me in the way that Paul has presented it to us.  I definitely never thought of it as a loopy process.  I think it is important for teachers to stress the fact that the brain is designed to explore, instead of introducing the different parts of the brain as responsible for certain, specific actions.  The way that my other professors have taught about the brain made it seem like the brain's functions are set in stone.  They never talked about what a complex system it is, which maybe could just be because they didn't want students to ask questions that they did not know the answers to.  I think there are a lot of misconceptions by students and parents that teachers know almost EVERYTHING on their subject matter, but I think that it makes the classroom more exciting and unpredictable when teachers don't give the answers to everything, but instead allow the students to explore the questions.