She should just tell the teacher she is not allowed to stay past her hours. I understand that the teacher could use the extra help, or even Stacy could use the extra money. However, it's not a good idea. . .what if she gets hurt on the job or something? Maybe the teacher could find a parent volunteer to help her if she needs the extra help. The only way I would say it is ok, is if the district ok'd the extra time. . .but I have a feeling that's not going to happen.

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"No one believes more firmly than Comrade Napoleon that all animals are equal. He would be only too happy to let you make your decisions for yourselves. But sometimes you might make the wrong decisions, comrades, and then where should we be?"
- George Orwell Animal Farm