the 35 best speeches in History including an excerpt from each one. It's from a joke website but nevertheless it still lists some speeches that can be used in the classroom.
Discovery has created an entire list of topics with free lesson plans for history teachers. Each topic breaks down the lesson and teachers could use this as little or as much as they need.
A compliation of historical documents from the University of Oklahoma's College of Law. Free and accessible makes this a good page to have on hand when in need of some primary sources for the classroom.
A great video, that features an interview with J Robert Oppenheimer, the chief scientist on the manhattan project, brings chills, let's students recognize that wea re in the Atomic Age.