Starting next month, middle and high school students in Middletown will need to lock up their phones during the school day.
The school district said after the Thanksgiving break, students will need to put their phones in magnetic pouches when they walk into school.
They can't be unlocked until the end of the day.
A spokesperson said the new cell phone policy has been gradually rolled out since the beginning of the school year.
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Up until now, the school district has asked students to keep their phones turned off and out of sight.
This policy has been adopted in other school districts like Torrington, Manchester and Waterbury.
New Haven plans to implement the policy in January for elementary and middle schoolers.