This program covers the important topic of Standard Deviation and Variance in Probability and Statistics. We begin by discussing what Standard Deviation and Variance is and why it is important. Next, we solve several problems that involve these concepts to give students practice with the material. The entire lesson is taught by working example problems beginning with the easier ones and gradually progressing to the harder problems. Emphasis is placed on giving students confidence in their skills by gradual repetition so that the skills learned in this section are committed to long-term memory.