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Lockdown. Lockdown. Lock the door. Shut the lights off. Say no more. Go behind the desk and hide. Wait until it’s safe inside.

Lyrics on a poster in a kindergarten classroom meant to help students know what to do during lockdown drills. It apparently goes to the tune of "Twinkle, Twinkle, Little Star."

Lyrics on a poster in a kindergarten classroom meant to help students know what to do during lockdown drills. It apparently goes to the tune of "Twinkle, Twinkle, Little Star."

Caroline Cournoyer is GOVERNING's senior web editor.