Allow student groups to tell you their measurement as you record them on the board. Talk about strategies used, and graph them. Make one graph for the number of links, and another for the length of the chains. Students should be able to see that it doesn’t matter how many links you have, but how long they are instead.
This Estimate ‘N Measure game gives kids the opportunity to measure an irregular shape. Some kids may never have thought about how they could find the length of something that they can’t use a ruler […]