Stopping is the most powerful way to let your constituencies know what you really do and do not value, what you really will and will not tolerate. When a teacher stops a lesson dead in its tracks, it’s a big deal. When a principal stops the school day dead in its tracks, it’s a big deal. Everyone takes note.

Eva Moskowitz’s plans to expand her Success Academy over the next decade to 100 charter schools — including 12 high schools — gives the city a good opportunity to build on some, well . . . success.

On Thursday on these pages, we called for closing three charters where children aren’t learning. By the same logic, we want to encourage the growth of any schools, charter or otherwise, that work.

Principals talk a lot about vision. Take a look at any set of school leadership standards, and you’ll find a phrase comparable to “sets a vision of excellence” at the top of the list.

Eva Moskowitz: The founder and chief executive of Success Academy Charter Schools has approval to add 14 more charters to the 32 she already runs in New York City, adding heat to debates over sharing space and resources with traditional public schools.

The challenges that Success Academy students are up against would suggest poor academic outcomes, yet Moskowitz has managed to provide an environment that is having a dramatic effect on children’s lives in NYC. So, how did she do it?

One Bronx public charter school holds a distinct honor for not only being a top performer, but also as the first borough-based school to be recognized as such.

It’s like the bad penny that keeps appearing, only it costs hundreds of millions of dollars. The city teachers union has begun pushing a new property-tax proposal tied to a union employment program.

Click here to read the full letter.

Moskowitz, dogged as ever, is intent on molding shining models for next-generation public education.