This reads like a college application essay, and I don't mean that in a good way. The first half of the piece is just a list of high school accomplishments and the second half is vague and full of platitudes. Tell us what you learned when teaching seniors. Specific techniques you have found that worked, and ones that didn't. The highlight of the entire piece was a description of how one senior didn't understand how to tap his cellphone screen correctly, and that particular part desperately needed a proofreader.