increase font size Maine Academy of Natural Sciences graduates 21 in Threshold program Friday Alternative high school program allows students to finish their diploma requirements while working independently for part of the week. Share Becky Dennison, dean of students at Maine Academy of Natural Sciences, addresses the 2021 graduating seniors who completed the Threshold program Friday in the Hinckley area of Fairfield. Taylor Abbott/Morning Sentinel) FAIRFIELD — As they made their way to their seats, clad in a cap and gown, marching to the beat of “Pomp and Circumstance,” the 2021 graduates from Maine Academy of Natural Sciences’ Threshold program reflected on the challenges that they faced and the strides they made.