All four incidents happened within a week of each other in Brooklyn, police and school staff said.
The program visited at least 30 city public schools last year, according to its Facebook page.
Kindergarten students are being bused to P.S. 171 while an addition is built at their Woodside school.
"It all ended well," Chancellor Carmen Fariña said after the boy was found.
Here are tips on what to do if your family is still waiting for a seat.
Staff, parents and students spoke out against the state's controversial English exams Friday.
More than 200 P.S. 11 students will be temporarily relocated to P.S. 171 while a new addition is built.
Private nursery schools are preparing for big changes thanks to the city's universal pre-K plan.
Elected officials took aim at the plan to send students from the Woodside school to Astoria's P.S. 171.
A proposal to ease overcrowding at P.S. 11 in Woodside would make it worse, parents said.
Gilbert Gottfried, Robin Thicke and Penn and Teller are among the celebrities supporting the school.
A full day at a new charter school in Bedford-Stuyvesant will go until 5:30 p.m., administrators said.
DNAinfo.com New York ranked sought-after public pre-K programs based on their 2012 admission rates.
The program is the neighborhood's second, along with P.S. 111.
Pre-K applicant numbers are increasing dramatically, while space remains the same.
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