This download is a bundle of 3 products: A simple, hands-on experiment for students to discover the value of pi, A brief but extensive history of pi, and Two simple application examples including using pi to find your hat size.The experiment is simple enough for middle school students to complete easily. All each student needs is a round object (a cup, plate, roll of tape, etc.), a string, and a ruler (or a tape measure).The history notes include developments in Egypt, China, India, as well a