Dual enrollment offers the opportunity for students in traditional high schools, charter schools, and even homeschooling to earn college credits while still completing high school requirements.  Students may attend college classes in-person on the college campus, or online.  These courses may be offered at a reduced tuition rate (or even free, in some programs) and the credits are usually transferable, meaning that if the student attends a different college after high school graduation, those credits can be transferred to the new institution.