Online education has evolved from corresponding through mail to utilizing technology like cable, satellite TV, and now the internet to deliver distance learning. It allows students to take courses without attending a physical school by interacting with teachers and other students online. There are two main types of online courses - synchronous which require participating at scheduled times, and asynchronous which allow students to complete work at their own pace. While online education provides flexibility, accessibility, and independence, it also requires strong self-discipline and lacks in-person interaction.