Tuesday morning, a group gathered in the courtyard of Mission San Rafael to light candles and pray for those who died.
Heidi Kuhn of San Rafael launched the movement that used the hashtag #ChildrenDeservePeace. Kuhn heads the organization Roots For Peace, which works to remove landmines from war-torn areas.
"It's a humble act and we invite people around the world to take the simple act and moment of silence to light a candle in solemn tribute to the children who died due to the seeds of terror," said Kuhn.
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Similar candlelight vigils were in other countries.
Kuhn wants people to keep the candles lit until the end of the year in honor of the young victims.
If you'd like to contribute to the Roots of Peace effort to rebuild the school, click here.