free school

noun2

1. •
   An educational institution that provides tuition-free schooling, often with greater autonomy than traditional government oversight; a public school.
2. •
   An alternative school focusing on student freedom, democratic self-governance, and self-directed learning, often operating outside traditional curriculum constraint.

   • The Germans had a free school, rather like King Alfred School, in London. A school with co-education, much freedom, no punishments, no rewards. But it contended that the school must mould the child. — 1927