For many reasons. My daughter is in online school, meaning I don’t personally teach her (although I help) but she does it from home. In her case, it was because she was the very bottom of the pecking order at her middle school and was severely bullied every day (including an online doxxing incident the school did nothing about) until she broke down one day and said she couldn’t handle it anymore.

Thankfully, online schooling is an option available for girls like her that don’t quite fit in and get treated like shit because of it.