In this lesson, students make a prediction about annual precipitation in their local area, and then use normal precipitation data for each month of the year from an internet source to create a bar graph of that data. Normal is defined as a 30-year average, generally three consecutive decades. As a challenge, the students could add a line graph of the most recent year’s data over the bar graphed normal data to compare and contrast the data. If the teacher would like to use a more visual demonstration, an alternate suggestion for this activity is to obtain a fluorescent tube cover and seal one end with duct tape. Students use a yard stick to measure the tube and fill it with the annual normal amount of precipitation. This could also be done with the recent year’s amount of precipitation.