The document provides instructions for building a box and whiskers plot. It explains that box and whisker plots use the median, quartiles, minimum and maximum values of a dataset. The instructions say to line up the numbers, find the median of the top and bottom halves, and note the minimum and maximum. A number line is drawn and boxes are placed around the middle values with whiskers extending to the minimum and maximum to complete the plot. An example is provided of calculating the values for a box and whiskers plot from a dataset.