This is one of the most comprehensive search engines and websites in the world on the Vietnam War. It has over 3.2 million pages scanned materials from government and military documents, newspaper articles, photographs, maps, artifacts, sound/audio recordings, etc. Great for finding material, resources, and primary sources.

This is a website that focuses on the history of women from all parts of the world. Has teaching materials with primary sources, lesson plans, document-based questions, and other supporting resources. Ideally for a high school curriculum.

A online model curriculum in World History for middle school and high schools. It is an continuing project consisting of material and resources from K-12 teachers, collegiate instructors, and educational technology specialists. Has teaching units, lesson plans, and other resources.

A resource providing documents in US History from the 1600s to present day. The overwhelming majority of these primary sources are presidential speeches/inaugural adresses and famous supreme court cases.

These is a website that provides quality educational resources. This website directs you to primary source documents that can be used for various activities or lessons. You can also buy various materials for teaching which are categorized by subjects.