AllSides for Schools is a great resource to teach bias for students and help them learn to be critical thinkers.
Wisconsin 9/11 Memorial & Education Center
The Wisconsin 9/11 Memorial & Education Center’s website offers free lesson plans specific to teaching students in Wisconsin about the events of September 11th, 2001. While it is specific to Wisconsin, the lesson plans can be easily adapted for any location. The site also offers field trip activities and links