Curated OER
The Geography of the United States
Full of bright maps and interesting information, this presentation details U.S. Geography. Slides include basic facts about size, regions, topography, and demographics, as well as fascinating trivia about the United States, including...
Curated OER
The US Population Problem
In this algebra worksheet, 11th graders calculate how many seconds it takes for the population to increase by one more person. There is an answer key to this problem.
US Census Bureau
U.s. Census Bureau: Population Clocks
This U.S. Census Bureau Web site has two population clocks with notes available. One clock shows the population increase for the United States. The other shows the world population increase.