Physicists and other physical scientists and engineers routinely use algebra and calculus, including vector calculus, in problem-solving. But the hard part of physics problem solving is often at the beginning and end of the problem, namely getting to an algebraic expression from a description of a physical situation in words or other representations, and interpreting an algebraic expression as a statement about what will happen in the real world. This course will use examples from electromagnetism involving scalar and vector fields in the three-dimensional world to explore a variety of problem-solving methods, including using information from experimental data, approximations, idealizations, and visualizations. The emphasis will be on how geometry can help.