This lesson plan introduces 10th and 11th grade students to the system of checks and balances outlined in Federalist No. 51 by James Madison. Students will work in pairs to read and discuss Federalist No. 51, taking notes and filling out handouts as they do so. Their understanding will be assessed through a quiz, observations of their pair work, and responses to discussion questions about checks and balances and its role in the American government. The goal is for students to understand this important aspect of the US Constitution.