The National September 11 Memorial Museum officially opens to the public on May 21, 2014 in New York City.
According to the 9/11 Memorial website, The National September 11 Memorial is a tribute of remembrance and honor to the nearly 3,000 people killed in the terror attacks of September 11, 2001 at the World Trade Center site, near Shanksville, Pa., and at the Pentagon, as well as the six people killed in the World Trade Center bombing in February 1993.
The names of every person who died in the 2001 and 1993 attacks are inscribed into bronze panels edging the Memorial pools, a powerful reminder of the largest loss of life resulting from a foreign attack on American soil and the greatest single loss of rescue personnel in American history.
If you are unable to visit the museum in person, the 9/11 Memorial website provides an extensive collection of artifacts in the form of eyewitness and personal accounts, video, audio and pictures. Lesson plans, teaching guides and tips on talking to children about 9/11 are also offered on the website. It is truly a valuable resource intended for us to never to forget the horrific attack on America.
The New York Times has published an interactive guided tour of the National September 11 Memorial Museum. The NYT also features an article with the museum’s chief curator and other officials about the collection of artifacts and the stories they tell.
Other resources
September 11 Timeline – National 9/11 Memorial
9/11 Primary Sources – National 9/11 Memorial
9/11 Mobile Apps – National 9/11 Memorial
Explaining the News to Kids– Common Sense Media
Teach2Know 
Thanks for the resources. Some kids I teach have no idea what happened!
As time goes on younger students will not know. This year marks the thirteenth anniversary of 9/11. My elementary school students have no idea, yet we continue to show the memorial on TV. It is an very important event in our history and we have to continue to educate our children because the threat of terrorism is their reality unfortunately.