Test your knowledge about setting, characters, sequence, exposition, conflict, climax and resolution. Take this 14-question test, review your correct and incorrect answers, and print out your assessment.
Try to meet the world's projected energy demand by choosing from the available energy sources, while keeping atmospheric CO2 under control. You must avoid the limits and pitfalls associated with each energy source.
One way to solve a complicated problem is to solve a smaller version of the same problem. Without working out the larger problem, predict how many sheep will get shorn before impatient Eric, who is sneaking up in line little by little.
The departments and agencies of the executive branch are responsible for regulating many of the things we use in our everyday routines. Follow a student through her day to find objects regulated by the government.