Online education allows students to learn through online content and testing via the internet. It provides flexibility for students of various backgrounds and reasons for learning. Podcasts, videos, and slideshows are examples of media that can be used to teach online. Popular websites for online learning include Khan Academy, MIT OpenCourseware, SlideShare, and online degree programs from accredited universities. Overall the document discusses different aspects of online learning including benefits like flexibility and weaknesses like lack of in-person interaction.