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The prominent leader of New York City’s leading charter network has sent out an SOS to supporters as the schools face the prospect of a new mayor opposed to their expansion.

“There are currently serious threats to the educational excellence your child deserves,” wrote Eva Moskowitz, the CEO of Success Academy, in an email obtained by Gothamist. “We need 100% of parents to get on the bus with us.”

Moskowitz urged families to attend an all-hands-on-deck “Rally and March for Excellence” on Sept. 18. Clas

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