Harvard Extension and similar colleges typically offer only one year of physics courses, prompting learners to seek further study options. After completing a first-year course, which often covers classical physics topics like mechanics, thermodynamics, optics, and electricity, students can delve deeper into specific areas. A logical next step is to take an introductory modern physics course, utilizing recommended textbooks. For those particularly interested in electricity and who have a background in multivariable calculus, advancing to an intermediate-level Electricity and Magnetism (E&M) course is advisable, with widely used texts available for this purpose. This progression allows for a more comprehensive understanding of physics concepts and applications.