Every September 17, Constitution Day calls on teachers to memorialize—and critically engage with—Constitutional history in the classroom. But what approach to the Constitution should you take? What quality teaching resources are available? How can you interest your students in a document that is more than 200 years old?

In 2008, Teachinghistory.org published a roundup of Constitution Day resources. Many of those resources remain available, but online Constitution Day content continues to grow. Check out the sites below for materials that recount the Constitutional Convention of 1787, compare the Articles of Confederation with the Constitution, explore U.S. Supreme Court cases that have interpreted the Constitution, and apply the Constitution to contemporary debates.

The Library of Congress's Constitution Day page collects the full text of the Constitution, Bill of Rights, and Amendments, as well as the Federalist Papers and the Articles of Confederation. Lesson plans for grades 6–12 accompany the documents. The page also includes short suggested reading lists for elementary, middle, and high school, and links to relevant Library of Congress American Memory collections, such as Documents from the Continental Congress and the Constitutional Convention and the papers of James Madison, George Washington, and Thomas Jefferson. Also check out the Library's collection of primary sources "Creating the United States."

You can find an elegant, simple presentation of the Constitution on the National Archives' Constitution Day page. Check out their high-resolution PDF of the original document, part of NARA's 100 Milestone Documents exhibit.

If the Constitution is proving a difficult read for your students, try the National Constitution Center's Interactive Constitution. Search the text by keyword or topic, and click on passages that are unclear to find explanatory notes from Linda R. Monk's The Words We Live By: Your Annotated Guide to the Constitution. The Constitution Center also offers its own Constitution Day page, with a short video on the creation of the Constitution, interactive activities, and quizzes.

If you're not already familiar with EDSITEment, created by the National Endowment for the Humanities, take a look through their extensive collection of lesson plans. A quick search reveals more than 90 lessons related to the Constitution.

Interested in bringing home to students the Constitution's importance today? The New York Times' Constitution Day page links current events to the Constitution in more than 40 lesson plans. The Times also invites students to submit answers to questions such as "Should School Newspapers Be Subject to Prior Review?" and "What Cause Would You Rally Others to Support?"

Can't find anything here that sparks your interest or suits your classroom? Many more organizations and websites offer Constitution Day resources, including the Bill of Rights Institute, the American Historical Association, Annenberg Media, and Consource. (Check out our Lesson Plan Reviews for a review of a lesson plan from Consource on the Preamble to the Constitution.)

History teachers have long asked students to create timelines to help conceptualize and understand historical events. Student-created timelines were often limited by the space they occupied. Often teachers would have students focus on a few events and ask them to write very small on their notebook paper to squeeze in events. Clever teachers invested in rolls of butcher paper or banner paper to have students create long timelines. But thanks to today's web designers, timelines are no longer limited in space. Using free timeline builders online allows students to see concepts over time without the constraints of paper and a straightedge.

I have always liked using timelines in my classroom to help students see change over time and help students remember chronology (an oft-heard complaint for students of history).

My students have made standard social, political, and economic timelines of eras of U.S. history in preparation for exams. My students have also created the popular timeline of events leading up the Civil War. I thought myself a clever teacher using large rolls of butcher paper for these timelines to maximize the number of events included and student participation. It was not until I sat down to read the new National Curriculum Standards for Social Studies put out by the National Council for the Social Studies that I saw another way for students to create timelines. "Learners demonstrate understanding by using graphic software to create a timeline depicting a scientific idea of the evolution of a technological innovation, and predicting how that idea or technology might develop in the next 10–20 years." (NCSS 57) With this, I began my search for digital timeline-building websites.

A quick search revealed lots of possibilities for creating timelines online for free. I had to spend a little time playing with each one to find the site that would best work for my needs and students. There are sites that are better tailored to elementary students. There are also those that are more powerful, but less user-friendly. This site provides a nice review of the various digital timeline sites available for free. My project required students to create events with years BCE and CE, which limited the sites I could use and may be a consideration in your site choice. You may also wish to consider what types of multimedia features you would like students to be able to embed in their timelines. Some sites offer the ability to embed pictures and videos. Most timeline-building sites allow users to embed their timelines in blogs or other websites, making sharing timelines easy.

Adapting the product recommended by NCSS, I asked students to create a timeline showing the impact of the Scientific Revolution on a specific field of modern science. To go one step further, students were to make some predictions about future developments in that field (i.e. chemistry, geology, meteorology, etc.). My students quickly caught on to the user interface for the timeline builder and in three 45-minute class periods had researched and created a timeline specific to their field of modern science. You can see an example of one student's timeline here. With more time and practice, I believe that my students will become better at creating richer timelines. After they had created their timelines, students were able to view each others' and comment on them. Ultimately, we created a class timeline merging events from each student's timeline to see the broader impact of the Scientific Revolution.

Digital timelines allow teachers greater flexibility and creativity in assigning timeline activities to students over the old paper timelines. They also allow students to collaborate in a way that fosters chronological thinking and in-depth analysis of eras in history. I hope that you will experiment with digital timelines and share the creative ways you use them in your classroom.