This post is based on my thoughts in reaction to a friends post on facebook referencing her 10 yr old daughter's fears in reaction to a video of the 9/11 events.
I do believe all of our history, the good and the bad, needs to be taught in our schools but I believe it needs to be taught based on an age appropriate basis. Subjects involving death, terrorism, suicide, etc should be screened carefully and worded appropriately based on age. Yes, history happened, yes we need to learn it all, but some of it is pretty scary, violent, horrific stuff (i.e. concentration camps, mass suicides, etc.), so maybe like movies, content should be rated as to what age group it is suitable for.
I think any video where people are dying should be a high school type of thing. Showing a video of buildings full of people falling to the ground does not exactly rate at middle school level in my mind.