School safety is already facing an early test after three serious incidents in three school days.

At Taft High School in the Bronx, police say a 17-year-old was attacked outside Monday morning.

“One of the biggest issues that we’ve been dealing with is youth violence and gun violence, and it has not improved,” Mona Davids, founder of NYC School Safety Coalition, said.

Davids said the timing itself is troubling.

“This is not the best way to start the school year,” Davids said.

The teenager is expected to survive. Police say his attackers got away.

Students say the school was put on hold, but some only learned why from each other.

“They didn’t communicate it to us, but word spreads around fast. So, we ended up hearing it, but we didn’t hear it from the teachers,” one Taft High School told NY1.

Then Monday brought more concern. Police say students in Queens and on Staten Island were each found with loaded guns in their backpacks.

“This is definitely an outlier. Usually, we’ll encounter this the first week of October, second week of October,” Davids said.

The warning signs began even earlier.

On Sept. 4, school staff in Sheepshead Bay detected another loaded gun in a teen’s backpack as he went through a scanner.

“We do need more scanning in schools. We do need more school safety agents to do the safety scanning,” Davids said.

Back at Taft, concern has not erased every student’s sense of safety. But three days in, that sense of safety may be the first test schools cannot afford to fail.