Heartwood Educational Collaborative, the Waldorf-inspired charter school formerly called WISE Academy where some parents in West Marin have opted to send their children since 2014, lost its access to public funds this week and must now rely on reserves to stay open.

The umbrella school program through which Heartwood holds its charter, CalSTEAM, ran into difficulties with its authorizer, Liberty School District in Sonoma County, and decided to self-revoke its charter. The Fairfax school was…