Light microscopy has become one of the most useful tools in the life sciences. Following the traditions of great courses on light microscopy, such as those offered by the Marine Biological Laboratory, EMBO, and the NCBS in Bangalore, this free online comprehensive course begins with the basics of optics, proceeds through transmitted light microscopy, covers the various methods of imaging fluorescent samples, describes how cameras work and image processing, and concludes with some of the latest advances in light microscopy. In addition to lectures, they also provide labs (filmed at a microscope) and short tips, so as to cover pragmatics of how to use microscopes. Assessments are provided for each lecture. Enjoy learning microscopy!