Almighty Sara — Carolyn Chambers Clark

When Sara Webster gets framed for stealing the answers to the psych midterm, she texts The Almighty for help and gets it.

As long as Sara answers a few pesky emails, she'll be free to use her
new powers to become beautiful, popular, have all the great clothes,
get classmate and cafeteria tormentors off her back, get all A's, and
date that new hot boy everybody wants. That's the fun part. She also has to
decide whether to help her parents with their failing diner, do something
to stop her best friend's mom from drinking, bring the warring junior
prom committee together, and help the down-trodden maintenance staff
at school. Her real dilemma is how she can do all of these things, still
get good grades in school, and not anger the Almighty.