Derive the meaning of Pi using concrete models and/or appropriate technology. 0606.4.12

Links verified on 1/03/2010

1. Calculating Pi - activity using string, meter stick and several types of cylindrical containers
2. Lesson on Circumference of a Circle - examples and five practice exercises
3. The Magic Circle - activity using coffee can lids, string and rulers
4. Measuring Around - find circumference - five multiple choice questions
5. Pi - explanation from Wikipedia including an excellent animation at the top of the page