On the 11th anniversary of that day, I now have three children. Each year we sit together and we watch the memorial coverage on TV. I want them to know about this day. We, as a nation, said that we will never forget and that means that we must teach our children about it. We should teach them about it to show them that hate breeds evil; to show them that true hero's aren't in movies or on a football field but in uniforms and on a firetruck.
Below are some websites to help you teach your children about what happened on September 11th, 2001:
The 9/11 Memorial website will have a live showing of the 2012 Commemoration Ceremony starting at 8:30 am EST on September 11, 2012.
The History Channel has many great articles on the day and the aftermath.
New York Magazine has an Encyclopedia of 9/11.
Television Archive has links to news broadcasts from 9/11 and the days after.
CNN has many articles and links in their War on Terror Special.
There are some wonderful 9/11 tribute videos on YouTube if you do a search there.
You can also go to TV Guide online, click on listings and then put 9/11 in the search box to find this year's television specials.