Other
Topo Zone: Free Usgs Topo Maps for the Entire United States
A huge collection of topographic maps for each of the US states. Scroll down to see a map of the United States and click on the state you are interested in. From there, you can search for a particular location, choose a featured map, or...
Houghton Mifflin Harcourt
Harcourt: School Publishers: Types of Land
This clickable map of the United States defines different geographic features such as mountains, plains, islands, and deserts.
Enchanted Learning
Enchanted Learning: Geography
At this site from Enchanted Learning, you can take a quiz, printout a map of the United States of America, and see where the Middle East is located in the world. Links are also provided for additional information.
NOAA
Noaa: Estuaries 101 Curriculum: Where Rivers Meet the Sea
A complete learning module where students watch an introductory video, take an estuary quiz, learn about landforms related to the environment, and use maps and real-time data to study estuary ecosystems in the United States.