For older students Preparation Tape a big sheet of paper on the wall so that children can mark their head heights. Calculators are optional if students can divide decimals by hand. Need class-size graph paper or transparencies for the bar graph. The activity Trace around your foot on a piece a paper. Measure its length and record the result.
Centimeters are more convenient, or inches and tenths of an inch.
Have someone help you mark your height and name on a paper on the wall, and measure your height using the same units. Find the ratio of your height to foot length by dividing. Find the average for the class. Cooperate with another class and find out, or make a whole-school project. Another related activity Have everyone take off their right shoe.