The mother of one of the 26 victims of last December's Sandy Hook Elementary School massacre in Newtown, Conn., has written a powerful letter to the teachers of America.

Nebla Marquez-Greene had two children attending Sandy Hook Elementary on that day: Dec. 13, 2012. Her daughter, 6-year-old Ana Grace, was killed, but her son was uninjured. Twenty children and six adults died in the shootings by a 20-year-old man who also killed his mother in their Newtown home.

Her letter, shared with Education Week is powerful, gut-wrenching and encouraging all in one. Read it after the jump.

John Moore/Getty Images

... I wanted to share my story in honor of the teachers everywhere who care for our children.

I lost my 6-year-old daughter Ana Grace on Dec. 14, 2012, in the rampage at Sandy Hook Elementary School. My son, who was in the building and heard the shooting, survived.