CrashCourse is an educational YouTube channel created by John Green and Hank Green. It offers a wide range of courses covering subjects like history, science, literature, and economics. Each video is designed to be engaging and informative, making complex topics accessible to learners of all ages. The channel features animated graphics and a fast-paced presentation style, which helps to maintain viewer interest. Since its launch in 2012, CrashCourse has gained millions of subscribers and has become a popular resource for students and educators looking for supplemental learning materials.