Download 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 This cross-curricular unit on catapults has students focusing on controlling variables while testing and modifying classroom catapults. 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