Bertrand Russell divides up Plato’s Republic into the three neat sections. You may find his simple outline helpful:
- Bertrand Russell, History of Western Philosophy, Book I, part 2, ch. 14
Taylor Marshall is the Adjunct Instructor in Philosophy at the University of Dallas. 
Aristotle called the philosophy of being "first philosophy" because it does not examine the parts of reality (politics, math, music, history), but reality itself: existence, change, properties, space, time, causality, and possibility. This first philosophy is also called "metaphysics," deriving from the Greek words meta ("beyond") and physica ("physical").
I designed this site for students taking the Philosophy of Being section at the University of Dallas. Whether or not you are taking the course, I hope that you find the articles, outlines, and essays helpful.
Metaphysically,
Taylor Marshall
This website is cool. Is this part of the core or do you offer this course for the upper-division only?
Also, where can I find more of Bertrand Russell’s thoughts about Plato on the web?
thanks,
-freshman