Using current and historical data, the U.S. Census Bureau offers geography teachers activities with resources to use in the classroom. The activities are aligned to the National Geography Standards (2012) and provide real-world data examples while teaching concepts such as environmental changes and population changes. In a geography activity for elementary and middle schools, students will examine a series of photos from over twenty to more than one hundred years in order to show how human actions and population changes can affect the environment. Students will compare famous landmarks in the United States such as Times Square in New York, the Saltair Pavilion in Utah, Laguna Beach in California, and Niagara Falls in New York. With each set of photos, students will look at changes in housing, business, and population data from the two points in time.