Hi Peter, I moved this to its own thread. For every new essay, please start a new thread. Also, in order to start new threads, you need to leave comments on other people's essays to help them (your participation ratio).
Principals of schools are not only responsible for the student body, but
also for the business elements that converge with education, all culminating in a review of their performance.
With this essay, you didn't follow the prompt. This challenge was to write a letter to convince the principal. You didn't form it as a letter, and you didn't really write it the way you would if you were really trying to persuade the guy.
For the other one, I think it looks great! In the first paragraph, it will flow nicer if you keep the verb tense consistent:
This conclusion was based on... but that is no big deal. Good luck with it!!
Kevin, EssayForum.com