"When something this big happens in the United States, no one forgets where they were," said Capital Prep teacher Emily Galati.
The teachers at Capital Preparatory Magnet School in Hartford remember it all, but most people in that school building can't relate because they were either too young or not even born yet.
"I was barely even one, so, I didn't register anything had gone wrong," said a student.
For that reason, this is a tough lesson to comprehend for some students.
"I can't imagine living in a city and looking up and seeing buildings getting hit like that," said student Asyera Clarke.
The teachers at Capital Prep are making sure students know everything about that day, including every detail, the magnitude of the horror and why this all happened.
"The terrorists were having a hard time, so, they thought they should make other people feel like they should have a hard time, said fifth grader Alana Lilley.
Some students have a hard time grasping all the details because, although young, they still feel connected to that day in some way.
"Me being Muslim myself, I want to make sure people get the right image out there. People think that all Muslims are terrorists. Stereotypes basically," said student Abdulhai Elamin.
While this is still a delicate subject to talk about and most stories from that day are grim, the teachers at Capital Prep try to focus on the positive aspects of 9/11 as well.
Some students are writing letters to first responders and the heroes who saved countless lives.
"I think they did an excellent job trying to help other people," said one student.
In Connecticut, there's no set curriculum for teachers to follow when discussing 9/11, so, teachers at Capital Prep say they follow a simple guide: showing good sometimes wins over evil.
"Good things can still happen on a day that was so sad in history," said Galati.