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National Atlas
This site is excellent for mapping. You can create ANY kind of map you need. Select all kinds of layers: agriculture, biology, boundaries, climate, history, and more, and then select the geography. It does take some time to figure out...
Alabama Learning Exchange
Alex: Plan the Adventure of a Lifetime With Lewis and Clark
This plan is the first lesson plan in my unit on Lewis and Clark. This is a project-based, hands-on unit in which students "become" part of the Corps of Discovery - the members traveling in the Lewis and Clark Expedition. In this lesson...