
Courses for many common high school math subjects are available online. Learn about the different types of courses offered, the benefits of each. Free online math help: review lessons, homework help, learning aids, video schools, home schools, teachers, parents and educators in mathematics. We have resources suitable for many different levels; from grades 1 to 12, High School. Bottom line: Instantly add meaningful lab experiences to math and science classrooms for exactly $0? It's tough to beat that. Grades: 3–12 Price: Free.