Planning for the district’s two new elementary schools is on track and, if all goes according to plan, construction would begin in March, said Superintendent Michael Graner. Graner said construction hopefully then will begin in March on the new elementary schools, starting in areas as far away on the site from the existing middle school buildings as possible, with the lion’s share of construction to be done starting in the summer when the students are out of school. The projected opening date of the elementary schools is Sept. 2021. The new elementary schools are estimated to cost $45 million each, Graner said. The state approved 80 percent state reimbursement for the school at the Cutler site after Groton requested diversity school status to help address racial imbalance, Graner said.