The Library of Congress is now accepting applications for its week-long summer institutes for K-12 educators. Held at the Library of Congress in Washington, D.C., this professional development opportunity provides educators with tools and resources to effectively integrate primary sources into K-12 classroom teaching, with an emphasis on student engagement, critical thinking, and construction of knowledge. The Library is offering five programs this summer. Four of the programs are open to teachers and librarians across all content areas. One focuses on primary sources in science, technology and engineering. During each five-day institute, participants work with Library education specialists and subject-matter experts to learn effective practices for using primary sources in the classroom, while exploring some of the millions of digitized historical artifacts and documents available on the Library’s website.