article_snippet: Colleen Ritzer was a popular and enthusiastic math teacher at Danvers High School.
article_snippet: In memoriam: The campus of Danvers High School was flooded with flowers and other tokens following the October 2013 murder of teacher Colleen Ritzer .
article_snippet: Danvers High School community mourns the tragic death of beloved math teacher Colleen Ritzer whose body was found behind Danvers High School .