Liberated Learners is a non-profit organisation that supports the spreading of the North Star model.  Today there are about a dozen centers based in the USA.

North Star teens are individuals moving forward in unique directions at a pace that is right for them. North Star is not a school. We do not offer diplomas, credits, or grades. Rather, North Star offers an alternative to school where teens learn in the way that suits them best.

Source: https://www.northstarteens.org/#what-is-north-star