Gov. Mike DeWine has signed a bill limiting cellphone use by students in Ohio schools. The Senate and House passed the bill within the last month. The policy was added to an unrelated House bill in a Senate committee and the Senate later passed it. The bill requires public schools to create a policy limiting phone use as much as possible during school hours. It also requires the Ohio Department of Education and Workforce to create a model policy for schools to adopt if they don’t want to make their own. There are exceptions. Cellphones will be allowed if the device is being used as a learning tool or to monitor a student’s health.