The Tennessee House of Representatives has approved a controversial bill that would allow some teachers and staff to carry concealed handguns on public school grounds. The 68-28 vote in favor of the bill sends it to Republican Gov. Bill Lee for consideration. It would be the biggest expansion of gun access in the state since last year’s deadly shooting at a private elementary school in Nashville. The bill, which the state Senate previously passed, would bar disclosing which employees are carrying guns beyond school administrators and police, including to students’ parents and even other teachers.