For preparing for a spring Graduate Electromagnetism (E/M) I course using Jackson's textbook, it's essential to focus on key mathematical topics such as partial differential equations (PDE), ordinary differential equations (ODE), linear algebra, and mathematical methods. These areas are frequently utilized in graduate-level electrodynamics. While Jackson is widely regarded as a standard reference, some participants in the discussion express a preference for Schwinger's approach, highlighting its clarity and effectiveness. It is suggested to explore Schwinger's text for additional insights and a different perspective on the subject matter. Accessing university library resources for a thorough review of these texts is recommended for effective preparation.