We are measuring our bodies. First we traced around each other with chalk.
We talked about who was the tallest and how did we know? What happens when we use different peoples feet to measure? We found out that we needed to make sure our feet had to go end to end otherwise we hadn't measured the gaps and that we couldn't compare the measurement unless we used the same measuring tool. Other ways we found to find out who was taller was to directly compare by standing back to back.