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- Grade Range
- 9th - 12th
- Rating

Students research the Mayan number and calendar system. They translate a variety of math problems from base-10 Arabic numbers into a base-20 Mayan representation. They discuss current challenges faced by the people in today's Guatemala. Full Review »
- Grade Range
- 9th - 12th
- Rating

Students examine the human impacts that conservationist Michael Fay noticed on his Congo Trek, and Africa MegaFlyover projects. They write recommendations explaining what should be done about human impacts and environmental threats. Full Review »
- Grade Range
- 7th
- Rating

Students examine the environment, agriculture, and warfare of the Mayan civilization. They read a handout, analyze and interpret maps, and discuss archaeological theories to try and determine the cause of the collapse of the Mayan civilization. Full Review »
- Grade Range
- 3rd
- Rating

Students examine the world's rivers in this six lessons unit which mingles science with social studies. The dynamic forces that create erosion in nature are also seen as habitats and ecosystems that are affected by environmental and man made changes. Full Review »
- Grade Range
- 9th - Higher Ed
- Rating

Students examine the human impact on natural resources. They read and discuss an article, evaluate nations regarding their environmental problem-solving, develop a presidential speech on the environment, and conduct a natural resources scavenger hunt. Full Review »
- Grade Range
- 2nd - 5th
- Rating

Students examine soil types and determine the ability of each to absorb water. Working in groups, they time how long it takes for water to seep out the bottom of the cups. They examine soil components, conservation, erosion, and tree harvesting. Full Review »
- Grade Range
- 7th - 9th
- Rating

Students explore the idea of sustainable development and recognize its implications for different people, places and environments, and for their own lives. Small groups of pupils study different projects, and report their findings to the class. Full Review »
- Grade Range
- 6th - 8th
- Rating

Students investigate the process of desertification in the Sahel region of Africa. They discuss photos from a National Geographic magazine, analyze the physical/political map of the Sahara, identify the causes and effects of desertification on a handout, and write a conversation between two people. Full Review »
- Grade Range
- 4th
- Rating

Students write a letter from the perspective of an animal group whose environment has been affected by humans. The letter will identifies how the environment has been changed and how it has affected the habitats of the animals. Full Review »
- Grade Range
- 5th - 8th
- Rating

Students examine the characteristics of the rainforests. Using the characteristics, they discover how animals and plants are dependent on one another for survival. Using various maps, they locate rainforests depending on the criteria. In groups, they plan solutions for the problems facing the rainforest. Full Review »

