I am going to see what is going to be taught to my children on 9/11 this year. If it is anyway similar to this crap they will be absent that day and spending the day with me learning the truth.
I haven't seen any requests for adults to attend the day's activities. It seems that having the parents present (those who choose to attend and are able to make to time to do so) would do more to foster a sense of "community". But then some parents would raise a red flag at some of the obvious indoctrination.
Adults should only visit the schools for "open house" (when everything is in order, no surprise inspections) and to discuss what their jobs are like, I guess.