An essay is a short piece that answers one question. Then it shows why. A few paragraphs. One idea from the first line to the last.
One question
The reader wants your answer. Then your reasons. That is the whole job.
Should students use phones at school? I think no. They stop the lesson. They make it hard to think.
Not a story
A story moves through time. An essay stays on one idea.
I sat down. I opened my bag. My phone buzzed. I looked at it.
True, and not an essay. Nothing is being answered.