I was 11 and in school that Tuesday morning. Neither of my parents were into watching the morning news so I had walked to school not knowing what was going on (we lived in California). Starting during 2nd period (after 9:30am PST) kids started leaving class as their parents were picking them up. It was only during 4th period that an assembly was called and the kids who were left at school met in the cafeteria. The vice principal told us some of what was going on and said that while it was pretty serious that we were all safe and had nothing to worry about.
By the time school ended for the day most of the kids and most of the teachers had gone home. At 2:45 school let out and I walked home. My parents got home from work later on and we watched TV and got to see the towers falling over and over as people were talking about what happened.
School was out the next day but we were back on Thursday.
For myself I really don't know what the world was like before 9/11 and it seems amazing to me that there was a time when you could get on an airplane without a lot of hassle and that there was a time when the police didn't dress and act like a military occupation force.
It also seems like a fairy tale that there was a time when the government didn't spy on absolutely everything we do.
IMHO the terrorists won because they hate our freedom and liberty and we responded to their attacks by killing our freedom and liberty as if we'd wanted to do it all along.
We didn't even watch it in any classes after that.
I am slightly older than you so I do remember what it was like Pre-September 11th.
Shoot that very June in 2001 on our California Vacation we stopped by Camp Pendleton, my fathers former Marine Home in the 70's. He had forgotten his ID at home here in Kansas City. But he told the guard that and he just waved us through. We could have been ANYONE and they let us drive everywhere on the Base.(several of the buildings from the 70's were still there)
Shoot, the Marines didn't even have a back gate, next thing you know we are in Oceanside.