Is this a good 4 year plan?

For an advanced student, yes, this looks like a proper answer. Your entire senior year wouldn't even be in my schedule, so technically, you are taking above and beyond classes. For example, I took Alg 2 Junior year, and will be finishing it senior year. I stretched out my classes, because emotionally and mentally I had a hard freshman and sophomore year, but now I'm much better. I took Psychology this past year (my junior year) and it was amazing. By the way, our school does schedules every year, because of failing classes and things, so students HAVE to be able to edit their schedules to graduate.