This document discusses measures of central tendency including median, mode, mean, and range. It provides definitions and examples of how to calculate each measure. The median is the middle number when values are ordered from lowest to highest. The mode is the most frequently occurring number. The mean is the average, calculated by adding all values and dividing by the total count. Range is the difference between the highest and lowest values. The document also describes a jigsaw cooperative learning activity where students are assigned a topic, learn with others assigned the same topic, and then teach their original group.
