This inquiry leads students through an investigation of rights and responsibilities involved when posting to social media. By investigating the compelling question “Social media, why can’t I post that?”, students evaluate the power of the written word, its effect on others, and civic responsibility toward others. The formative performance tasks build on knowledge and skills through the course of the inquiry and help students understand there are limits to freedom of speech when it adversely affects others. Students create an evidence-based argument about those limits and why they should not post anything they want whenever they want.