So... I really need some advice on how to approach this and deal with this. One of my student's grandmother comes in weekly to volunteer. She's great, really. The other week, she said she was going to run a bunch of advance copies of a tiny workbook that I do weekly in my classroom. Displeased with the work it needed to make these at school, unbeknownst to me, she made the copies at the local Staples and presented me with a receipt for over 500$. I don't have that much money in my school or personal budget to reimburse her. And I really don't need this kind of stress right now.