HSI was created in order to facilitate the use of primary sources in history education. By using the concept of historians as detectives, the site has collected several "cases" for students to examine using a pre-vetted set of related primary sources. The site describes the HSI model as having four steps:

1. Becoming a Detective—basic context and introduction of an overarching question
2. Investigating the Evidence—examining primary sources
3. Searching for Clues—answering questions which organize analysis of primary sources
4. Cracking the Case—presentation of an evidence-based conclusion and questions formed by the investigation

Site navigation is not as intuitive as it could be. Be prepared to use the "back" button frequently. That quibble aside, the site offers a good variety of cases—the March on Frankfurt, children in the Civil War, refusal to attend the Constitutional Convention, slavery in Virginia, school desegregation, the Boston Massacre, the demise of Jamestown, the dropping of the bomb on Japan, Elvis and Nixon's meeting, a genealogy case, the Battle of Lexington and Concord, and Nathaniel Bacon. There is also a fictional murder/cause-of-death case which can be used to introduce students to the process and way of thinking which each of the historical cases requires.

This website presents historical sources and teaching materials that address notions of childhood and the experiences of children and youth throughout history and around the world. Primary sources can be found in a database of 200 annotated primary sources, including objects, photographs and paintings, quantitative evidence, and texts, as well as through 50 website reviews covering all regions of the world. More than 20 reviews and more than 70 primary sources relate to North American history.

The website also includes 20 teaching case studies written by experienced educators that model strategies for using primary sources to teach the history of childhood and youth, as well as 10 teaching modules that provide historical context, strategies for teaching with sets of roughly 10 primary sources, and a lesson plan and document-based question. These teaching resources cover topics ranging from the transatlantic slave trade, to girlhood as portrayed in the novel Little Women, to children and human rights. Eight case studies relate to North American history, as do two teaching modules.

The website also includes a useful introductory essay outlining major themes in the history of childhood and youth and addressing the use of primary sources for understanding this history.

A project of the Historical Society of Pennsylvania, PhilaPlace explores the history of two neighborhoods in Philadelphia—Old Southwark and the Greater Northern Liberties—historically home to immigrants and the working class. Using an interactive map and more than 1,240 primary sources and audio and video clips, visitors to the site may navigate the neighborhoods and learn more about their development from 1875 to the present day.

Visitors may navigate the interactive map using filters found under two tabs to the left of the map: "Places" and "Streets."

Under "Places," click on marked points of interest to bring up photographs or audio or video clips describing the history of the location. These points of interest may be filtered by 14 topics (such as "Food & Foodways," "Education & Schools," and "Health") or by contributor (the Historical Society of Pennsylvania, its partners, or visitors to the site). The map may be set to show the city's streets in 1875, 1895, 1934, 1962, or the present day—note that points of interests from all time periods appear on all maps. Two virtual tours through the points of interest are available, one for Greater Northern Liberties/Lower North and South Philadelphia.

Under "Streets," visitors can view demographics for four streets—S. 4th St., S. 9th St., I-95, and Wallace Street—from 1880-1930. Buildings on each street are color-coded to show land use, the number of residents per building, and the ethnicity and occupation of each building's residents.

Collections allows visitors to search the more than 1,240 primary sources and audio and video clips available on the site. Filter them by topic, neighborhood, type, or contributor.

The site's blog presents mini-features on certain locations, notifications of updates, and information on professional development and other PhilaPlace-related events. Educators provides a timeline for each of the neighborhoods and four suggested lesson plan/activities, while My PhilaPlace lets visitors create free accounts and save favorite materials to them—or create their own up-to-25-stop city tour. The Add a Story feature allows visitors to tag locations on the maps with their own short descriptions or memories (up to 600 words long), and accompany them with an image or audio or video clip.

Attractive, interactive, and accessible, PhilaPlace may appeal to Pennsylvania educators looking for a tool to help students explore urban history.

This website—a small portion of the larger Documenting the American South project—presents the full text of more than 130 works of literature by more than 75 authors, published between the mid-1600s and 1920. Notable works include the first history of Virginia, written in 1673 by House of Burgesses member Robert Beverley, poems by Edgar Allen Poe, Booker T. Washington's autobiography Up From Slavery, and several of Mark Twain's and Kate Chopin's works. Other works include collections of slave songs, sermons, and narratives published in the mid-1800s, including Frederick Douglass's famous narrative, several works addressing Ku Klux Klan activities, and many lesser-known works of fiction. Though there is no built-in search feature, all works are presented as lengthy text files and can be searched using a computer's "Find" function. Users new to Southern history may want to turn first to the "Introduction," which provides brief essays on many aspects of Southern history, literature, and culture, including early colonial-era literature, the genres of biography and autobiography, black literature, the Civil War, travel writing, folklore, and humor.

One of the Famous American Trials sites created by Douglas Linder of the University of Missouri, Kansas City, School of Law, this site explores the 1969-1970 trial of the Chicago Seven, a group of radicals accused of conspiring to incite a riot at the 1968 Democratic National Convention in Chicago. Linder provides a 1500-word account of the trial, which includes links to brief (100-word) explanations of specific terms and biographies of some of the key figures. The site provides a chronology of the lives of those involved in the trial from 1960 to 1998; images of two Yippie posters; a map of the key Chicago riot sites; and roughly 350-word biographies of 15 of the defendants, lawyers, and other figures in the trial. There are ten audio clips of defendants, prosecutors, and witnesses discussing various aspects of the riots and the trial. The site offers full-text versions of the indictment against the Chicago Seven, the trial manuscript, the contempt of court specifications against two of the defendants, and the appellate decision that overturned the contempt convictions and the convictions for intent to incite a riot. Additionally, there are 16 images of the riots and key figures and 14 quotations. A bibliography of 13 websites and 15 scholarly works leads to other sources for studying the Chicago Seven's trial and their lives as radical activists. This is an ideal site for researching 1960s activism and culture.

This site provides images and text about the 1906 San Francisco earthquake and fire. A timeline, from April 18 to April 23, covers major events and a facsimile of a roster lists names and addresses of those who died. There are 27 photographs of earthquake damage and 31 personal accounts, 1,200 to 8,000 words, that include Jack London's "Story of an Eyewitness." Among 67 transcriptions of articles from 1906 about the earthquake are 12 that discuss the relocation of Chinatown and the treatment of Chinese San Franscicans. There are 31 transcribed fire department reports, including an article about the reorganization of the department in the wake of the disaster, and a facsimile of the 1910 police report on the quake and fire. Army operations are discussed in 29 pieces of correspondence and navy evacuation operations are detailed in seven. In addition, a 700-word article describes the evacuation of the city by train. Engineering and scientific reports include 24 articles, letters, and reports about infrastructure issues, such as water supply and structural stability. A section about relief efforts includes a flier accusing the Red Cross of corruption and a resolution by a local plumbers union to volunteer their services. The site will be very useful for anyone interested in the earthquake and in urban and California history.

Currently provides 22 census data samples and 65 million records from 13 federal censuses covering the period 1850-1990. These data "collectively comprise our richest source of quantitative information on long-term changes in the American population." The project has applied uniform codes to previously published and newly created data samples. Rather than offering data in aggregated tabular form, the site offers data on individuals and households, allowing researchers to tailor tabulations to their specific interests. Includes data on fertility, marriage, immigration, internal migration, work, occupational structure, education, ethnicity, and household composition. Offers extensive documentation on procedures used to transform data and includes 13 links to other census-related sites. A complementary project to provide multiple data samples from every country from the 1960s to 2000 is underway. Currently this international series offers information and interpretive essays on Kenya, Vietnam, Mexico, Hungary, and Brazil. Of major importance for those doing serious research in social history, the site will probably be forbidding to novices.

Presents approximately 2,240 Civil War maps and charts and 76 atlases and sketchbooks. The materials, primarily Union and Confederate "reconnaissance, sketch, coastal, and theater-of-war maps which depict troop activities and fortifications," also include commercially-produced maps. Provides 210 maps and three atlases belonging to General William Tecumseh Sherman, and 341 maps and sketchbooks prepared by Confederate topographical engineer Major Jedediah Hotchkiss. A "Special Presentation" offers a 10,000-word essay illustrated with 17 photographs and maps on the history of mapping the war. Maps can be viewed with the Library of Congress's excellent map viewing software. Very useful for Civil War specialists and those interested in historical geography.

Examples of brass band music from the 1850s through the 19th century. "Bands of this kind served in the armies of both the North and the South during the Civil War, in the field as well as for the entertainment of the officers." Including both printed and manuscript music, the collection features more than 700 musical compositions, as well as eight full-score modern editions, 19 recorded examples of brass band music in performance, and a gallery of 37 photographs taken of bands during the Civil War.

Also provides a 10,000-word "Special Presentation" entitled, "The American Brass Band Movement: A Historical Overview," that includes 15 drawings and photographs. Useful primarily to music specialists, the site may also be of interest to those studying the popular culture of the Civil War era.