What kinds of upstanders could your students write about? Have they read texts about historical upstanders? Are there additional texts in your anthology, school or classroom library that would focus them on the topic? Do they have prior knowledge that they could build on? What more do they need to read and research to expand their knowledge of the topic?
Does your school have a character education or anti-bullying program? If yes, can the topic be adapted for the content and texts that are a part of those programs?