(Reuters) – A year after a gunman massacred 26 first-graders and adults in a Connecticut elementary school, educational officials across the United States continue to face the longstanding question of how to best protect their students.

Principals and administrators across the country in many cases are choosing between technologies such as electronically controlled doors and the addition of security staff.

For one district, the Richmond School District outside Milwaukee, that has meant spending $24,000 to protect its one building with buzzer-entry doors and better lighting but choosing to skip bullet-proof glass.  Read more