California Gov. Gavin Newsom is urging school districts to limit students' use of smartphones on campus as the academic year begins. In a letter sent to school leaders on Tuesday, Newsom cited the troubling impacts of excessive smartphone use among young people and applauded districts that have already taken action to prevent students from using cellphones during the school day. MORE: https://www.cbs8.com/article/news/education/california-governor-gavin-newsom-restrict-cellphones-school-districts/509-d5b39fe3-8d5c-446e-8795-aa9342bf28ac