Reading, writing, rabble-rousing.

A bold new elementary school on the Upper East Side will teach the wealthy a thing or two about the have-nots — even if stodgy neighbors blast its name.

The East Side School for Social Action opened on East 91st Street this fall, and its two kindergarten classes are already shaking up the status quo.

Principal Daniel McCormick told The Post each grade will eventually have a different theme that teaches the ABCs of altruism and has students organizing “social action” projects.

“We’re instilling values in children, to always remember others are not as lucky as we are,” McCormick said. “What a great idea to start teaching them when they’re 4 or 5 years old.”

The agenda this year is homes and habitats — the pint-sized reformers will run food and gift drives for the homeless. In the spring, they’ll raise money for the rain forest.

“We have this cachet of the haves on the Upper East Side,” said PTA co-president Miriam Quart, wife of state Assemblyman Dan Quart. “It’s important for students to understand the have-nots. They don’t see the hunger and homelessness that is out there.”

But some Upper East residents object to the school’s revolutionary name, saying it’s too political.

“Social Action implies some kind of undercurrent of change that they want to implement. It sounds activist,” said Michele Birnbaum, 68. “This far outweighs what an elementary school is supposed to do and reflects a certain philosophy of this principal.”