The students from Newtown are being bused to the neighboring town of Monroe, where a former middle school was renovated for them after the Dec. 14 shootings.
"Things went well," said Brenda Lebinski, whose 9-year-old daughter is starting fourth grade at the school. "There was a lot of police presence when we pulled in. There were lots of teachers and therapy dogs greeting the kids when they walked in."
Lebinski said her daughter's transition was eased because she was able to have the same teacher as last year.
"She was very happy to be back at school," Lebinski said. "Most of the kids were fine."
More than 400 students attend the elementary school for children from the village of Sandy Hook in Newtown, where officials had security posted at schools across the district. The district has announced a partnership with the John Jay College of Criminal Justice of The City University of New York to review school security measures and make recommendations.
A lone gunman, 20-year-old Adam Lanza, killed 26 people at the school and committed suicide after fatally shooting his mother at their Newtown home. The motive remains unclear.
Town voters will be asked in October to approve plans to demolish the school where the massacre occurred and build a new one on the same property.