2018-2019 common app essays

I just have a quick question regarding the Common App essays. Am I allowed to use an essay that I have previously written for school as my essay for the Common App? I wrote several between AP Lit and AP Seminar that apply to some of the prompts. Also, what are the overall requirements for Common App essays, I can’t find anything clear online. Thank you!

The odds are overwhelming that the Common App was what your teacher had in mind when assigning the essays.

That said, be sure that the version you use is geared towards being admitted, not towards getting an A; they may not be the same thing.

There is a maximum of 650 words total. The App won’t let you input a 651st word.