He should have left her bound, gagged, and naked for the next man to use,

Using a formula and making her wait was more abusive than what I recommended. If you want real caring you'd have them constantly monitoring her progress and helping her with the subjects she\s struggling with. Or linking the spankings to tests and quizs so she can get immediate feedback.

Then he should know how to do it right,

The spankings clearly aren't working. They should stop waiting for report card day and give her weekly or dally spankings until she improves. And send a spreadsheet with the formula out to all of her friends so they'll know that she's not just getting grounded,

Stop teasing,

She should be spanked for cheating - no one should rad the instructions,

They should keep her naked and spanked all the time that she's there. And sand that picture to everyone on her friends list on facebook,

very very long. Sean took up too much room if you were going to get his bare butt blistered every time. The aunt should have taken the girl down teen trail and spanked her and left her there nude for others to spank - or stood her nude againt the bathroom wall. Why have that if the aunt isn't going ...

He should have had her skirts and panties off and caned her for wasting his time. Then she would have had to stand on the bus and both Sandras would have something in common,

Write another story where all of the rich bitches get sentenced to ten years there,