“There is this one module where a boy said hi to a girl he knew in school, but she didn’t say hi back to him,” said Aliza Gussin, 17, of Glenbrook North High School. “The module was about not assuming the worst in that situation — not being like: ‘Oh, she didn’t say hi to me. She must hate me. We’re not friends anymore.’ I know things like that really do happen in high school. I know it sounds kind of ridiculous, but it does really happen.”