Arts and craft anysis by Robin costs lewis

"I would figure out all the right answers first, then gently mark a few of them wrong. If a quiz had ten problems, I'd cancel out one. When it had twenty, I'd bite my tongue then leave at least two questions blank: _____ _____. A B was good, but an A was too good. They'd kick your ass, call your big sister slow, then stare over your desk, as if you'd snaked out of a different hole. Knowing taught me—quickly—to spell community more honestly: l-o-n-e-l-y. During Arts and Crafts, when Miss Larson allowed the scissors out, I'd sneak a pair, then cu t my hair to stop me from growing too long."

I CANT SEEM TO UNDERSTAND THE MESSAGE TO THIS POEM. I know she is trying to not be too perfect but I don't understand why. I was to know what it means and the message behind it