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Trinidad Menchu, a recent graduate of Dorsey Senior High, said her phone helps her concentrate during independent work because it allows her to listen to music.

Trinidad Menchu, who was a senior last year at Dorsey, recalled an assembly where the school explained how and why the lockers would be used in classrooms.

When Menchu entered the class, teacher and football coach Irvin Davis was adamant about locking cellphones away, explaining that he wants them to get the most out of their education.

“You wouldn’t see a phone on site,” Menchu said.

Though it’s still a work in progress, Johnson and Menchu agree that classrooms using the lockers have seen much higher student engagement — the first step on the school’s mission to raise test scores and the number of students who qualify for college.