Look beyond the irritated people and make new connections in other districts or even at the state level. But you should keep testing the waters with your ex-colleagues too. There is a great deal of animosity in our community toward our charter school and much of it is based on misinformation. There is a lot of misinformation out there about charter schools generally, as well as mischaracterizations of what individual schools are trying to achieve. A very basic misconception is that charter schools are private, not public, schools.
Soome people think that charters enroll only high-achievers or only special populations.
If these kinds of miscommunications are a problem for your school, your action plan for sharing should be thoughtful about ways of influencing opinion without getting defensive. The easiest things to share are the things that you think make your charter school special. So it's easy to fall into the bragging trap. Stay focused on the goal of establishing two-way communication with other public schools. Keeping student success at the center of the discussion is a good way to go.