Looking to Get a High School Diploma Online through a flexible, student-centered program? Odyssey Online Learning offers free public online high school education to eligible South Carolina students in grades 9 through 12. Our personal attention, flexible curriculum, and student-focused services enable students to work toward their diploma while learning in a supportive virtual environment. Since 2009, we have served SC students with a mission to provide accessible, high-quality education. Discover your alternatives by exploring Odyssey Online Learning.