Brazil’s President Luiz Inácio Lula da Silva has signed a bill restricting the use of smartphones at school, following a global trend for such limitations. The move will impact students at elementary and high schools across the South American nation starting in February. It provides a legal framework to ensure students only use such devices in cases of emergency and danger, for educational purposes, or if they have disabilities and require them. Education minister Camilo Santana told journalists in the capital Brasilia on Monday that children are going online at early ages, making it harder for parents to keep track of what they do, and that restricting smartphones at school will help them.