Negative Effects of Sexism
Responding to Sexism
Sexual Harassment Fact Sheet (especially relevant: the Responding to Sexual Harassment section)
Real Stories about Sexism and Responding to It
The Girls’ Guide to Calling Out Sexism Without Being Attacked
Counterpoint to “3 Reasons Why It Pays to Not Let Sexist Comments Slide”. Lots of stories, and a couple of suggestions at the end.
Hollaback! You have the power to end street harassment
Allies workshop: Geek Feminism Wiki
The preexisting, awesome equivalent of my idea, for men who want to stand up against sexism and be allies for women.