Groton-Dunstable Regional High School Principal Michael Mastrullo has sent along a last-minute Tweet, reminding parents that the school’s open house is this evening. He writes: Open House will be held this coming Thursday, the 28th of February, from 6-8pm. Please come prepared with your son/daughter’s schedule, as we will not be sending schedules home. The night will afford you the opportunity to meet his/her teachers and catch a glimpse of a typical school day. Hope to see you then!