Read as many as you can in a class period, and select two that you like to share with the class. Print a copy of each so we can read them together and discuss what makes them work--what makes them good writing.
Try these two sites out first:
From Johns Hopkins University.
From Connecticut College.
From Hamilton College.
Feel free to check out the websites of some colleges you have interest in--and see if they have a page dedicated to successful college essays.
Print two selections for class for tomorrow. Make copies for your classmates if possible.