Tonight, about one out of every 10 students in New York City will sleep in a homeless shelter or in the homes of relatives. That’s more children than at any other time since city records have been kept. In the morning, those same children will fan out across the city to go to school, some crossing multiple boroughs to get there.

Last year, the number of city students in temporary housing topped 100,000 for the third consecutive year, according to state data released Monday by Advocates for Children of New York, a group that provides legal and advocacy services for needy students.

Those students are the most vulnerable victims of homelessness, an issue that has dogged Mayor Bill de Blasio since he took office in 2014. But as the number of homeless children continues to swell, there hasn’t been a significant increase in public or private dollars spent to support these students.