What is Patent Number 139,121?

Check out newly published online teaching activities that focus on some of the most famous patent records and inventions in our holdings.

Communication in History: Resources for NHD 2021

Find primary sources and teaching activities for National History Day!

19th Amendment Centennial Commemoration

Commemorating the 19th Amendment

Join us for webinars, online student programs, and more to commemorate the centennial of the 19th Amendment.

Summer Student Programs and Teacher Professional Development

Summer & Fall Online Student Programs and Professional Development Webinars for Educators

Join us online this summer and fall! We have programs for K-12 students and professional development for educators.