Download Save to Drive ADD TO FAVORITES Add to Folder creative writing children's book activities classroom tools language arts and writing vocabulary Create new folderCREATE NEW FOLDER SHARE Grade: 6 7 8 9 Subjects: Social Studies and History Middle Ages Science + show tags Themes: Inventors and Inventions Type: Worksheets Holidays: Mathematics Education Month This cross-curricular unit on catapults has students focusing on controlling variables while testing and modifying classroom catapults.