Most states, including NH, consider distance (online) learning as homeschooling, even if it is full-time in an accredited program. This is because these programs are not approved or reviewed by the states’ departments of education. College Board, the organization that issues the SAT exam and Advanced Placement program, follows this same standard. 
Full-time enrollment in the Virtual Learning Academy Charter School (VLACS) is not homeschooling as it is a NH-based chartered public school. However, students may be considered homeschoolers if their enrollment in VLACS is part-time. VLACS typically requires prospective full-time students to temporarily enroll as homeschoolers for a short period prior to being accepted. Please see our additional information about VLACS if this applies to your student.
There are thousands and thousands of online education providers. Some offer individual classes while others offer entire curricula across grade levels. Below is a list of several popular online education providers. This is not an endorsement or recommendation, but listed only as a service to the homeschool community. We also have an extensive list of free online education providers.
Center for Talent Development (CTD) at Northwestern University
Classical Learning Resource Center
George Washington University Online High School
Johns Hopkins Center for Talented Youth
Liberty University Online Academy
Massive Open Online Courses (MOOCs)
North Atlantic Regional High School (NARHS)
Stanford Online High School (OHS)