The Digital Public Library of America (DPLA) serves as a portal to the digital collections of more then 40 state, regional, and online-only libraries, museums, archives, and other cultural institutions. Created to strengthen access to public resources and to "create novel environments for learning, tools for discovery, and engaging apps," the DPLA is an invaluable first stop for teachers and students looking for primary sources, particularly regional history sources.

Visitors to the website can search the more than 4,500,000 objects in the collections of participating institutions using keywords, returning results they can filter by format, owning institution, partner, date, language, location, and subject. Clicking on an object brings up detailed metadata, including creator, date of creation, and a description of the object, as well as a link to its original location online. Visitors who create a free account can save their search results, make them private or public, and share them via Facebook, Twitter, or Google+.

Visitors can also browse objects on a map or timeline—a fantastic way to prompt thinking about how primary sources are located in time and space. The timeline stretches from 1000 BCE to the present. (Note that zooming into the map returns finer results.) In addition, more than eight virtual exhibits demonstrate how DPLA sources can be curated to tell stories about themes and events.

The DPLA's API (application programming interface) allows visitors with the know-how to create apps drawing on the DPLA's collections. An eclectic set of more than 10 apps lets visitors browse DPLA's search results as a "river of images," discover primary sources related to their Zotero bibliographies, and more.

A fantastic starting point for anyone looking for primary sources, teachers can feel confident pointing students towards the DPLA to begin research projects or turning to the DPLA themselves to find resources to support lesson plans.

This massive mega-website presents thousands of documents and images related to Missouri's social, political, and economic history, linking to collections housed at universities, libraries, and heritage sites across the state. These resources are organized both into archival collections (by topic and source type) and virtual exhibits.

Archival collections include maps, municipal records, government and political records, newspapers, photographs and images, books and diaries, as well as topical collections on agriculture, medicine, women, business, exploration and settlement, art and popular culture, and family, rendering the website's resources as useful for genealogists as for those interested in history.

Exhibits encompass a diverse range of subjects, and include topics of relevance to Missouri history (Miss Carrie Watkins's cookbook from the mid-19th century, several exhibits on life at the University of Missouri and Washington University, Truman's Whistle Stop campaign), and topics outside of Missouri (the body in Medieval manuscripts, Roman imperial coins, propaganda posters from World War II, and drawings documenting dinosaur discovery before the mid-20th century).

Teachers will be especially interested in the large Education section, which includes curricular resources on topics such as African Americans in Missouri, Lewis and Clark's Expedition, Missouri State Fairs, and the history of dueling.

Take some time on this guide to all things West Virginia. This website offers a plethora of articles from "Abolitionism" to "John Zontini." To aid your search, you can sort through articles by topical category, alphabetical order, selecting "random article," or running a keyword search for specific interests. Your search will return media as well as text results, nicely sorted into separate categories. Articles are brief, but cross-referenced; and they also include citations and images, when available and appropriate.

The encyclopedia also includes larger sets of information and images referred to as exhibits. Topics include steamboats, John Henry, the Kanawha County Textbook Controversy, the Hatfield-McCoy Feud, coal mining, historic preservation, the Swiss community of Helvetia, the Greenbrier resort, and labor. A similar feature offers a handful of historical West Virginia maps.

Want something more interactive? Try the thematic 10-question quizzes, forums, or interactive maps and timelines.

This site is dedicated to the history and continuing development of Native American technology and arts. It is designed and maintained by Tara Prindle, an archeologist on the Program and Events Committee of the Nipmuc Indian Association of Connecticut. A 500-word historical essay and five to ten illustrated descriptions of techniques introduce each of the 12 sections, including beadwork, stonework and tools, pottery, poetry, and food. A section on beadwork presents seven photos of 18th-century beadwork alongside six technical drawings. For five different kinds of beadwork, from bone to glass, the site provides between ten and 100 illustrations of beads. A section on wigwams contains nine pages of writings about wigwams from the 17th century as well as a photographic guide to building your own wigwam. Special features include more than 50 links to sites about Ojibwe language, history, art, and culture and a collection of illustrated essays (400-1,500 words) about Seminole men's clothing. Links to 58 sites about contemporary issues in Native American art, such as counterfeiting, and more than 100 Native American clubs and message boards. A useful site for research in Native American cultural and material history.

Exactly one decade from the events of September 11, 2001, a new memorial is slated to open at Ground Zero. The memorial website offers the expected information on visiting the memorial, as well as a wealth of information which can be of use well outside of the state of New York.

Plan Your Visit is the place to go if you are considering visiting the memorial yourself or taking a class to the site. Note that there are restrictions on items and bag sizes permitted, that the site contains no public restrooms, and reservations are required with the number of group visits per day limited. Prior to the official opening, visitors can view a preview museum, which includes a StoryCorps recording booth for sharing your own 9/11 story. However, there is still a hefty amount of information here for "digital only" visitors. For example, you can read about how names will be grouped on the memorial—by location at the time of the incident, by company affiliation, and by relationships requested by next-of-kin. What does this system say about how we define ourselves today with and against other people and organizations?

In the same section, you can also find a link to a free iPhone 9/11 history application. This app provides images, a timeline, and a tour of the World Trade Center area. The tour can be used to guide an actual walk, or it can be accessed from elsewhere to explore digitally.

About the Memorial provides an overview of the memorial's design and the reasoning behind these artistic and practical choices. This can be used to get your students to question the purpose of memorials and/or how environmental designs can codify collective experience and relate to the values of their time. One simple example is the use of natural elements—trees and water—in this memorial. How do these choices relate to concepts of healing, Romanticism, sustainability, etc.

Collections includes a variety of potentially useful subpages which present a smattering of 9/11 stories with artifact images and links to oral histories, as well as a small list of international tribute projects. The subsection "Contribute" also allows you or your students to upload reaction artwork, photos, videos, or stories.

Finally, there's "Teach + Learn," a section specifically dedicated to 9/11 and contextual education. Read through the key questions for a list of a number of the big issues brought up when discussing 9/11, such as how crisis and fellowship work in tandem and how to avoid the idea of the "Other," as fundamentally unlike oneself. There are also two teaching guides, one on artistic response and another on volunteerism. Another feature is a PDF on talking to children about 9/11. One suggestion listed is that 9/11 be addressed through the stories of individuals rather than themes of good or evil. Finally, this section includes webcasts on Middle Eastern culture, memory and memorials, the aftermath of 9/11, and the building of the 9/11 memorial; an interactive timeline; an interactive version of Lady Liberty, a statue bedecked in 9/11 artifacts and ephemera; and information on domestic and international attacks.

The Yale Digital Commons provides access to sources from the Yale Center for British Art, Yale Peabody Museum of Natural History, Yale University Art Gallery, Yale University Library, and Yale University on iTunes U.

Getting acquainted with the commons can be somewhat daunting. Arrival on the homepage simply offers a keyword search with only a slight indication of the extent or content types of the collections you can search. The description states the contents include "art, natural history, books, and maps, as well as photos, audio, and video documenting people, places, and events that form part of Yale's institutional identity and contribution to scholarship."

The best way to proceed is to select Advanced Search. From here, you can limit a search to items available online. You can also pick one or more of the aforementioned institutions to search within, or choose specific collections which range from African Art or American Decorative Arts to Vertebrate Zoology or Yale University.

Sources you can find using this system include apparel; architectural elements; arms and armor; books, coins, and medals; calligraphy; containers; drawings and watercolors; flatware; fossils; furniture; hardware; inscriptions; lighting devices; jewelry; manuscripts and documents; masks; minerals; miniatures; models; mosaics; musical instruments; packaging; paintings; photographs; plant and animal remains; print templates; scientific instruments; stained glass; textiles; tools and equipment; timepieces; toys and games; sculpture; and wallpaper.

Designed to promote Monticello as a historical site, this exhibit offers a variety of educational and practical information. Materials allow viewers to explore Jefferson's life at Monticello. Particularly interesting are the Day in the Life of Thomas Jefferson, where visitors can learn about a typical day's activities for the 3rd president, and the Ask Thomas Jefferson features, where schoolchildren may submit questions to Mr. Jefferson. Researchers respond to questions in Jefferson's voice, using his writings. By browsing the Day in the Life section, viewers can investigate 11 activities that Jefferson participated in nearly every day, from writing letters to farming. In addition, links within each activity provide further background on Jefferson's family, his personality, and Monticello.

Visitors may also take a virtual tour of Monticello, "visiting" up to 12 rooms in the mansion. The dimensions of the rooms are provided, as well as architectural information, color and design explanations, and a Quicktime panoramic movie. An image gallery contains 65 images, ranging from portraits of Jefferson to photographs of the mansion and grounds at Monticello to depictions of his inventions. Listen to the audio review:

This website offers an archive of more than 35,000 items from 75 individual collections at nearly 30 institutions in Illinois. Items include black-and-white and color photographs, post cards, audio recordings, maps, books, newspaper articles, newsletters and bulletins, handbills, and film clips. The focus of all the collections is the history of Illinois, its places, and people. A strength of the collections is the large number of photographs of residential and commercial buildings from cities and towns throughout Illinois.

Visitors can browse the contents of all collections by city, organization, or proper name. Once in a collection, other collections can be individually browsed by selecting from the collections dropdown menu. All collections are searchable by such fields as subject, description, creator, publisher, contributors, date, type, or format. Clicking on the thumbnail image brings up a new window with a large image and descriptive data. There are also 14 exhibits on various topics such as "History of Park Ridge, 1841-1926" and "Brides of Yesteryear." This is a useful collection of primary source material on the social and cultural history of Illinois.

ARC offers more than 78,000 digital government resources. Materials include textual records, photographs, maps, architectural drawings, artifacts, sound recordings, and motion pictures dating from the colonial period to the recent past. ARC includes items on presidents, the military, war, immigration, Japanese-American internment, slavery, science, prisons, federal programs, the environment, the National Park Service, foreign affairs, civil rights, African Americans, and American Indians.

To begin a search, click on the yellow "search" button near the top left of the ARC webpage. The search engine is clearly organized and invites queries on specific historical materials or general themes. To access digitized materials only, check the box marked "Descriptions of Archival Materials linked to digital copies." The site continues to expand, though, as it stands, it provides an exceptional collection of government material.

Intended to promote tourism to Colonial Williamsburg, this website is also rich in educational resources. Visitors may "Experience the Life" by selecting one of 12 categories, ranging from animals to food to the African-American Experience; and will find information and resources about each topic. For example, visitors can learn about colonial clothing for men, women, and children. There is a paper doll game where players must assemble the various layers of colonial clothing in the proper order. Selecting the link "See the Places" allows users to virtually visit 27 buildings, including the prison (Public Gaol), the Capitol, and eight colonial sites, including Market Square and Duke of Gloucester Street. "Meet the People" allows visitors to learn about prominent Williamsburg natives, such as the Randolph family, Thomas Jefferson, and Patrick Henry; or meet more diverse groups, like African Americans or colonial children.

The "Teacher Resource" section allows educators to virtually tour Colonial Williamsburg or learn about the science of mapping colonial America. It also provides 18 lesson plans for exploring such topics as the colonial reaction to the Stamp Act or the murder trial of Abigail Briggs. Listen to the audio review:.