I use this as a handout on our annual pi day party & celebration. You will need to bring string and a tape measure (or yard stick, etc.) Have students bring circular objects. They will be calculating pi values, percent error, and a scientific report on their findings. I normally throw a party with circular foods and games (after worksheet is complete). I l also have a Google Slides version in my store that students can type on. Yes - the price is the square root of pi ;) Please check out the