McGraw Hill
Glencoe Biology: Human Population: Self Check Quiz
Answer five multiple-choice, self-checking questions on human population.
Other
Rose Institute of State and Local Government
This organization studies State and Local Government in California. It has some nice statistics on local government in California.
PBS
Pbs Teachers:world in the Balance: The Growing of America
Explore the links among population growth, immigration, environment and support of the elderly in America. Conduct a role play and explore the options available to tackle problems caused by deomgraphic trends.