Classes resume at Danvers High School after teacher slaying ← Related Article Visit The Boston Globe Share on Twitter Share on Facebook Comment on this Scroll to top of page Essdras M Suarez/Globe Staff Students walked in front of a makeshift memorial for slain Danvers High math teacher Colleen Ritzer on the first day of classes after her body was discovered. Essdras M Suarez/Globe Staff Philip Chism, a 14-year-old student, has been charged with the teacher's slaying. Essdras M Suarez/Globe Staff Troy Fleming, a junior who had a class with Ritzer last year, left flowers at the memorial. Essdras M Suarez/Globe Staff Students leaving the campus said their day began with a meeting in which staff reminded them that grief counselors were on hand to help them deal with the emotional impact. Essdras M Suarez/Globe Staff The day passed slowly for Emily Nestor, a freshman. "It was . . . kind of sad. No one really knew what to do." Essdras M Suarez/Globe Staff The memorial includes handwritten notes, a pink Red Sox teddy bear, and a pumpkin carved with the mathematical symbol pi. Essdras M Suarez/Globe Staff Students said most of their class time was devoted to reviewing lessons already taught or to conversations about what happened.