She might need a youth clipper card https://www.clippercard.com/ClipperWeb/s... Call BART customer service if you want to clarify things. As far as i know, if she uses a regular clipper card, she probably wont get a discount. The regular card is for adults, so its based on the regular price. edit: so then she should already get the discount. The discount should have been calculated already, according to that webpage.