Digital History
Digital History: Republicanism
The framers of the Constitution had a great distaste for the monarchial society of Great Britain. See how this was reflected in the checks and balances they wrote into the Constitution in an effort to create a working republic.
PBS
Pbs Teachers:night Creatures of the Kalahari: Life in a Bottle
Understand that an ecosystem such as the Kalahari has a system of checks and balances to ensure that no species overpopulates and threatens the survival of other species. Chart a food chain and explore the balance between predator and prey.