Toilet paper and a yardstick is one of the methods being used to test airflow inside city schools. 

Mayor Bill de Blasio and NYC Schools Chancellor Richard Carranza toured Bronx Collaborative High School Wednesday to see what progress has been made. 

The school is one of many which is expected to open in just two weeks. 

Both the mayor and chancellor stepped inside classrooms and other spaces where students may be taught. They also took a close look at windows and the air ventilation system. 

However, photographs and videos taken inside schools of people holding up a yardstick with toilet paper to see if the airflow is flowing has some on edge. 

“The photograph that I was sent today showing a yardstick a school binder clip and a piece of toilet paper being used to determine if there is airflow out of a ventilation system in a school classroom is symbolic of the mayor’s whole school reopening plan. It's as if he wrote it on a piece of toilet paper and that he is just winging it,” said Councilmember Mark Treyger. 

Carranza emphasized that the test specifically was testing airflow not quality. “There is airflow to make sure there is air being exchanged in a room and there is air quality uses CO2 machines. This is a recommended air method for testing airflow,” said Carranza. 

De Blasio put an emphasis on the need for in-person instruction. 

“Everyone expressed the appreciation for remote learning, but they all said it wasn’t the same, it wasn’t enough,” said De Blasio. 

De Blasio also unveiled a new ‘Bridge to School’ mental health initiative for students, hoping it will help them in the coming school year.