Mankind: The Story of All of Us Episode 1: Inventors39 Question worksheet. (PDF, Microsoft Word, and Google Doc included)Do you want to show the History Channel's amazing new video series, MANKIND: THE STORY OF ALL OF US, EPISODE 1: INVENTORS, but are afraid your students will become bored or stray off-task? Fear no more! This worksheet will keep students engaged, on-task, and increase their comprehension of the series. While watching the video, students will complete a series of fill-in-the-bla