There are many excellent resources for teaching about 9/11.

Discovery Education Streaming:

Search “September 11″
The top resource is a “Theme page” about September 11 “featuring resources selected and created by Discovery Education’s curriculum experts, this theme page offers teacher’s guides, video clips, and more.”
“America Attacked: 9/11″ — Awesome Stories
Background information, video, audio clips, lesson plans and more:
http://www.awesomestories.com/disasters/america-attacked ]http://www.awesomestories.com/disasters/america-attacked
Lesson plan: http://www.awesomestories.com/disasters/america-attacked-sept-11/lesson-plan http://www.awesomestories.com/disasters/america-attacked-sept-11/lesson-plan

Note: “AwesomeStories is a gathering place of primary-source information. Its purpose – since the site was first launched in 1999 – is to help educators and individuals find original sources, located at national archives, libraries, universities, museums, historical societies and government-created web sites.”

Teachers Domain You need to create an account but it is free.

Muslins in America (includes discussion questions)
“Since 9–11, Muslims across the nation have faced numerous new challenges and opportunities as they continue to define their community in America. One of the key challenges has been differentiating themselves from terrorists in the eyes of the government and the public. This video from Religion & Ethics Newsweekly examines both the internal and external challenges facing American Muslims in the wake of the September 11th attacks.”
http://www.teachersdomain.org/resource/islam08.socst.world.glob.muslimamer/ http://www.teachersdomain.org/resource/islam08.socst.world.glob.muslimamer/

Thinkfinity

Search September 11 for a variety of resources and lesson plans

Other Links:
Dickinson University,”Teaching 9/11″ http://www.teaching9-11.org/ http://www.teaching9-11.org/
Education World http://www.educationworld.com/a_lesson/lesson244.shtml http://www.educationworld.com/a_lesson/lesson244.shtml
History News Network: [ http://hnn.us/articles/954.html http://hnn.us/articles/954.html
History.com videos: http://www.history.com/topics/9-11-attacks/videos#911-timelinehttp://www.history.com/topics/9-11-attacks/videos#911-timeline
102 Minutes that Changed the World – Interactive from History.com http://www.history.com/topics/9-11-attacks/interactives/witness-to-911 http://www.history.com/topics/9-11-attacks/interactives/witness-to-911
PBS News Hour Extra: http://www.pbs.org/newshour/extra/teachers/lessonplans/terrorism/sept11.html http://www.pbs.org/newshour/extra/teachers/lessonplans/terrorism/sept11.html

http://larryferlazzo.edublogs.org/2008/08/13/the-best-sites-to-help-teach-about-911/ http://larryferlazzo.edublogs.org/2008/08/13/the-best-sites-to-help-teach-about-911/ (Larry Ferlazzo Edublog resources) http://www.freetech4teachers.com/ http://www.freetech4teachers.com/