D.C. Public Schools released its snow make up calendar late on Friday, and while it could be worse, District students are indeed facing a dreaded lengthened school year after losing four-and-a-half days of instruction due to February’s historic snowfall. In a letter to parents, Chancellor Michelle Rhee explained that the school district explored options including extending the school day, converting vacation days into school days, and changing the dates of DC-CAS testing, but said…