How have railroads influenced urban growth? What are the consequences of population booms? What has led to the growth of tech centers like Silicon Valley? A series of short-answer questions from the College Board explores the dynamics in...

How can both individuals and governments respond to climate change and take responsibility to reduce its effects on our environment? Here you will find three lessons filled with discussion, debate, and role-playing...

We all know photosynthesis happens, but why should we care? Here is a unit that covers everything young scholars need to know about photosynthesis. Hands-on activities, assessments, and lectures guide pupils though the physiology of...