Thirteen-year-old Abby Fisher sits in the light-filled kitchen of her Vassalboro home on a chilly April day getting ready for school. She opens her laptop and sets a small speaker on the table. At the same time, about a mile away, the students in Abby’s seventh-grade science class at Vassalboro Community School are settling in at their desks. A live video feed from the classroom pops up on Abby’s laptop.