School officials in districts across the country are moving to three-day weekends in order to battle budget constraints, U.S. News reports. Nearly 300 districts operated on a four-day school week [1] last year, with several additional districts making the move this year, and more contemplating the move for 2013. Cutting an instruction day allows schools to trim transportation, janitorial, and utility costs. The Chattooga County School District [2] in Georgia [3], for instance, reported annual savings [4] of nearly $800,000 after switching to a four-day school week in 2010. But the shorter week requires students to power through longer days when they are in school in order to meet minimum class time requirements set by states. U.S. Secretary of Education Arne Duncan has spoken out against four-day weeks, and school boards in several states have shot down attempts in their districts to move to shorter school weeks…