This website is FULL of primary sources related completely to Martin Luther King, Jr. and the civil rights movement. You can listen to his famous "I have a dream" speech as well as find bibliographical information about MLK, Jr.
This is the Simithsonian website. A person can search past, present and future exhibition displays. You can also search their encyclopedia as well as search their collections.
This site would be great for high school students! Students can research primary documents or they can look at online exhibits of various topics that have already been compiled. When looking at the exhibits, an explanation is given and then various photos and videos are shown. This is a great resource for primary documents!
I think it's important not to forget the official site of the White House! Specific information can be found about past presidents, first ladies, camp David, Air Force One, etc. There is also a whitehouse site for kids. The URL for this is http://www.whitehouse.gov/about/white-house-101/
This website would be great for upper elementary or even middle school when learning about different ways to recycle and also about things that are not good for the environment. There are teacher resources as well as a game where students get to be the new city manager and help clean up the town by picking up litter and recycling. By clicking on different parts of the town they learn about harful and beneficial items. Kids do need to be able to read well to play this game which is why I think it would be best for upper elementary.
This is site for younger Elementary students teaching them about different ways that they can save energy. It also has several games that they can play.
This page has wonderful resources for teachers but also a few things that children might like as well after they have learned about healthy eating and the food guide pyramid. For example, there are many resources available for teachers to print when teaching about the food guide pyramid. There is also a "blast off" game that children can play. In the game children must supply their astronaut with the right balance of foods in order to make it to the planet they are trying to reach.
This page is put on by the US Census Bureau. This would be a great resource for children doing research on their own state, or any other state. Students can also learn about why the census is done every ten years as well as take quizzes about the census information found. Fun site for kids!
This is a government web site that helps students find a job/career that will be of interest to them based on what they enjoy doing. On the first page a student can select what they like to do and then it will take them to a list of various jobs that are related to their interests. Once there, students can choose a particular job to investigate it further. They can find out what they need to do to get that type of job, the pay, the need for wokers in this area, etc. I think that this would be great for high school students who are trying to figure out what type of career they would like to pursue.