What is it: This resource, also like the Early People and Inventions and Inventors
is also available through Worldbook providing basic encyclopedia information on “Living Green.” It includes how climate change is affecting different areas and how people can better use things in the environment. Additionally there is information on choice people can make in what they choose to buy to use renewable resources and leave less of a carbon footprint.Areas that are included: consumable goods, durable goods, forests and wetlands, green buildings, green transportation, mountains, deserts, and grasslands, oceans, islands, and polar regions, pollution, and producing and obtaining food.

Other features include- interactive features, activities, lesson plans, videos and animations, glossary, index, and dictionary.
Also like the other World book sites you can toggle between them. There are also links for other related articles.
What it is: This is about ancient and early civilizations. This is great for Social Studies classes. Some of the civilizantions that are included are: African (Ghana, Mali, and Songhai), Ancient Egyptians, Ancient Greek, Ancient Romans, Australian Aborigionies, Aztecs, Chinesse (Shang, Zhou, and Quin Dynasisty), Inca, Indians of Notrh America (Eastern, Northwest, Southwest, and Great Plains), The Maori, Maya, Artic, and Polynesians. There are activities, websites, articles, videos and more related to each of the main topics. Like the invetions and discoveries digital library this is also through world book. You can toggle between the different parts of world book so even if you go to a World book Student article you can then go to a worldbook advanced article (high school level). Worldbook also has a dictionary, additional websites and videos that can be searched.
list of smaller articles related to the topic (i.e. food, clothing, traditions, women, farming, traditions, rise and fall of the civilizations). Many of the articles include pictures. 
So even if you go to a World book Student article you can then go to a worldbook advanced article (high school level). Worldbook also has a dictionary, additional websites and videos that can be searched.