I liked this site because you could research different topics.  One thing that I found very interesting was that the day in history changes.  All of the links are related to whatever the main topic is.

On this site you can listen to a variety of audio clips.  I enjoyed the section on voices of presidents.  It would be fun for students to hear their voices instead of always reading a transcript of it.  

On this website you can search different topics about Nebraska history.  I think this would be very helpful for fourth grade students because they study Nebraska.  

Grouped by region, this website provides a variety of topics.  Although it looks like the website was last updated in 2008, I thought it would be another resource to use with children.  Many of the topics I looked at were not typical documents you would find on most websites.

The National Archives provides many primary documents.  Looking at the site, I also found the teacher resource section really helpful.  Some of the things that can be found there are how to find primary resources and how to use them. For teachers and librarian that are new to using this resource, or new a refresher, I think it will really benefit them.

This website has many different topics.  I like that they include topics like assembly lines and other important pieces of history that are not always featured on other sites.  Most topics that I look at included many images which students will love.

When students are asked to research the Civil War, this website provides a variety of documents that are interesting and helpful to students.  I enjoyed looking at documents that were personal stories from the war.  I think students will also like reading about the Civil War from multiple perspectives.

This website has many primary and government documents relating to the history of the United States.  One area that I really enjoyed exploring was the tools for educators.  Under that section, they had many tips for librarians such as creating book displays, bulletin board ideas, and a link to a poster so staff and students can vote on the most important American history documents.