MALVERNE, N.Y. - For Diana Razza, teaching about Sept. 11, 2001, is one of the more difficult lessons in the curriculum, especially because the anniversary comes just days after the school year begins."I remember the first year, especially, it was such an unnerving thing knowing the anniversary was approaching, feeling the need to honor it but feeling extremely uncomfortable talking about it beyond that," she said.The Brentwood social studies teacher will show a documentary about the Vigiano brothers of Long Island who both died trying to save the lives of others."I want them to see and understand the human impact of the events of that day and learn a little bit about what has changed," Razza said. Get breaking news alerts in the free.