Mayor de Blasio’s plan to provide child-care for 100,000 public-school students falls far short of the need, two City Councilmen say.

At least four times as many seats are needed to help parents grapple with the Department of Education’s patchwork plans to mix in-school and remote learning, Councilmen Ben Kallos and Brad Lander say in a letter to de Blasio obtained by The Post.

The lawmakers first proposed a child-care program two weeks ago. The mayor took up the idea, but “is doing it wrong,” Kallos said.

“More than 800,000 children from 3-K through 8th grade attend New York City’s public schools,” says the letter, also addressed to Chancellor Richard Carranza.