A kindergarten class in Somerville, Massachusetts, has a poster of nursery rhyme to the tune of “Twinkle, Twinkle, Little, Star” to prepare for an active shooter situation.

A "jarring" nursery rhyme posted in a Somerville classroom to help prepare young children for a lockdown is going viral.

A US mother has shared a confronting image from her daughter’s prospective kindergarten classroom, showing the instructions for a lockdown drill put to the tune of Twinkle Twinkle Little Star ...

A nursery rhyme about lockdowns posted on the wall of a kindergarten classroom in Somerville, Mass. (Courtesy of Georgy Cohen) ...

A photo of a poster containing a kindergarten "lockdown" nursery rhyme has resurfaced in light of the school shooting in Uvalde, Texas, showing that little has changed in the United States over ...

The set of directions for what children in class should do in the event of a lockdown drill, to the tune of “Twinkle, Twinkle, Little Star," sits in the Somerville classroom.

A video clip of a kindergarten teacher teaching children to sing a nursery rhyme has gone viral online, with numerous netizens saying they felt healed by the nursery rhyme's rhythm and cute message.

Georgy Cohen was touring her five-year-old daughter’s future kindergarten classroom Wednesday when she saw something she didn’t expect.