From site:  Generations of Americans have invested the flag with their own meanings and memories. Here’s your chance to interact with this national treasure and contribute your point of view. Whether you sing your own version of the national anthem, ace our 15-star quiz, get an up-close-and-personal look at the flag, or contribute your photos and stories to our mosaic—we hope these activities will inspire you to learn more about the history of the Star-Spangled Banner and what it means to you.

The Smithsonian IdeaLab provides brief sketches of each president, identifying the key traits that helped define them and helped to get them elected.  The sketches are accompanied by their official portrait from the National Portrait Gallery.

From site: 

History Detectives is devoted to exploring the complexities of historical mysteries, searching out the facts, myths and conundrums that connect local folklore, family legends and interesting objects.

Traditional investigative techniques, modern technologies, and plenty of legwork are the tools the History Detectives team of experts uses to give new – and sometimes shocking – insights into our national history.

History Detectives covers a range of historical eras, including the Civil War, the Gold Rush, the Industrial Revolution, World Wars I and II, and the Korean War. This season, we have created lesson plans that relate to four specific episodes and offer curriculum ideas in a variety of subjects. All meet McRel Content Knowledge Standards.

From site:

In 1861 Abraham Lincoln (1809-1865) became the United States’ sixteenth president. But before Lincoln became the nation’s chief executive, he led a fascinating life that sheds considerable light upon significant themes in American history. This World Wide Web site presents materials from Lincoln’s Illinois years (1830-1861), supplemented by resources from Illinois’ early years of statehood (1818-1829). Thus Lincoln/Net provides a record of Lincoln’s career, but it also uses his experiences as a lens through which users might explore and analyze his social and political context….

Search these primary source materials by using the toolbar (text, image, video, sound, interactive resource, or all) at the top of this and every page.

The site offers a Civil War curriculum for grades 3-12, with lessons targeted to elementary, middle, and high school students.

There is also a student section providing an overview, battles summary, primary sources, and how children were impacted by the war.