Examine how scientists determine the age of living and non-living trees and identify factors that impact sizes of tree rings. Analyze tree ring samples and determine the age of the oldest sample. Details »
Classroom Resources
Graph data from a table comparing U.S. and Japanese annual military spending in World War II, and calculate the change in output over time of specific military items. Use ratios to relate the number of war casualties to the population of a classroom. Details »
Prepare a "Beginner's Guide to the U.S. Stock Market" for people who know little about the topic, including jargon vocabulary and directions on how to read newspaper listings. Follow a stock on the NYSE for one week and graph its progress. Details »
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Everyone's Business
Explore entrepreneurship, competition in the market economy and additional topics including mergers, acquisitions, consolidation, joint ventures and hostile takeovers.
Global Population
Research population trends in developed and less developed countries and consider the political, social and environmental repercussions of discrepancies.
