The words, meant to be sung, are set to the tune of "Twinkle, Twinkle, Little Star".
Cohen wrote on Twitter that her daughter has already been doing lockdown drills in her pre-k classes.
It's not unusual for the walls of a kindergarten classroom to be plastered with colorful posters.
The new reality can be seen a poster of a lockdown song that hangs in a kindergarten classroom.
As school shootings happen at the rate of more than one a week on average (and that's just this year), schools across the country have been forced to do what they can to protect their kids from what often feels like an impending danger.
Her original post was tweeted more than 21,000 times as of Thursday evening. "Now it's time to have some fun".
Cohen saw the photo while she and Healey were touring the school, where their daughter will attend kindergarten next fall.
G7 photograph memifies Trump diplomacy
Trump also renewed attacks on Canadian Prime Minister Justin Trudeau , who had hosted the G7 meeting in Quebec . Dianne Feinstein, California Democrat, said it's one thing for Mr.
Social media reacted with surprise, shock and worry about the poem, according to Mashable.
But in a statement Somerville Public Schools said lockdown drills are a sad necessity, adding that "unfortunately this is the world we live in".
Not everyone, however, agrees, and her post is sparking heated conversations online about the appropriate way to prepare young children for the worst.
So far in 2018, the USA has experienced 23 school shootings resulting in at least one injury or death.
U.S. in the past few months have witnessed major school massacres, including the February 14 shootout at a high school in Florida that killed 17 people prompting widespread calls to reform gun laws. "Students in Somerville and across the country know how unnatural this is, as evidenced by their vocal leadership and advocacy this year in response to continuing school shootings", it reads. "It is jarring - it's jarring for students, for educators, and for families", the statement read.