Switched on Schoolhouse, Grade 4, AOP 4-Subject Set - Math, Language, Science & History / Geography (Alpha Omega HomeSchooling), SOS 4TH Grade CD-ROM Curriculum, Core Subject Set Switched-On Schoolhouse makes homeschooling easy and fun. Quick Installation: With a few clicks, Switched-On Schoolhouse is loaded and ready to use. Automatic Grading: Parents can easily keep track of student scores, assignments, grading needed to be completed, and preview assignments. This wonderful time-saving feature gives parents more hands-on time with students and less time with paperwork! Video Clips: Integrated into the curriculum, videos give students an up-close look at subject topics. Built-in Calendar: The calendar features allow you to assign/unassign school days, exclude date ranges, and add/remove events like field trips or holidays, and much much more. See the Features image above to see all the features of Switched on Schoolhouse. Built-in Calendar: The calendar features allow you to assign/unassign school days, exclude date ranges, and add/remove events like field trips or holidays, and much much more. See the Features image above to see all the features of Switched on Schoolhouse.