Mayor Bill de Blasio visited M.S. 331 in January to tout his plan to fund after-school programs for all middle school students. (Photo courtesy the mayor’s office)

New York City finally got specific about its plans to expand after-school programs for middle schoolers today.

A report released by the mayor’s office provides the first glimpse into how the city wants to spend $190 million more on after-school programs, and its per-student cost estimates indicate that the plan has undergone significant shifts over the last few months. Those figures are likely to take center stage when Mayor Bill de Blasio heads to Albany tomorrow to lobby lawmakers to allow a tax increase to pay for his ambitious education initiatives.

“This is not a small undertaking, it’s not a pilot project, it’s not a boutique effort for only a few schools,” de Blasio said today. “This is system-wide change.”

The total funding estimate for de Blasio’s plan to expand pre-kindergarten and the after-school programs has remained steady since he was on the campaign trail: $530 million per year, or what he estimated that a tax increase on the city’s highest earners would raise.

But some aspects of the after-school plan have clearly been in flux since January, when the mayor’s press secretary told NY1 that the program’s estimated cost was $1,600 per student. Today’s plan estimated the cost of each new after-school seat at $3,000.

Read the full story on Chalkbeat New York.