Each morning when students at City on a Hill Circuit Street Charter Public School in Roxbury, MA, arrive they slip their phones into a Yondr pouch to be locked up for the rest of the day.

CNN reports that Principal DeOtis Williams, Jr. implemented the program at the start of the school year.

“We noticed in previous years there’s been an increase in cell phone use in students consistently in school, whether it’s cyberbullying, whether it’s using the cell phone in class under the table. They’re just being more engaged in the cell phone than they are in the present moment,” Williams told WCVB.

The moment the phone goes into the pouch, students can't text their friends, call anyone, or use social media - They have to speak to each other.

Spanish teacher Erica O'Mahony said she has noticed a major difference in her students since the program was put in place.