The teacher -- who was not named -- sent an announcement to the class and told students to forward their receipts for proof, the media outlet says.
Superintendent Daniel Fishbein told CBS he is investigating the incident.
Tretola said the teacher later denied her child the opportunity to do extra credit work, saying it was too late in the semester, CBS said.
The concerned mom asked the BOE to create a district policy to keep situations like this from happening again.
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