(Radio Iowa) – At least two more Iowa schools have recently moved to ban smart phones from high school classrooms. Casey Berlau, the superintendent of Carroll Community Schools, says cell phones were already prohibited in elementary and middle school classrooms in the district, but the ban now extends to the high school. High schoolers will be allowed to put their cell phones, smart watches and ear buds in their lockers.

Each class lasts for 41 minutes and Berlau says without the distraction of a cellphone, students are likely to be more engaged in what’s happening inside the classroom.

Dallas Center-Grimes recently adopted a policy that bans cell phones from high school classrooms. In May, Des Moines Hoover High School administrators announced students would not be allowed to use smart phones, AirPods or other personal electronics during the school day. High schoolers in Ottumwa may take their phones to school, but have to store the devices in their locker all day.