The document discusses how using math journals can help students learn. It states that writing in math journals forces students to examine, express and track their reasoning about math problems. It then provides examples of open-ended writing prompts and strategies teachers can use to get students comfortable with writing about math concepts. These include think-pair-share, think-write-pair-share, and having students explain math ideas, formulas, and graphs in their own words. The document stresses that math journals can help both students and teachers understand the student's knowledge and thinking process.