Created by the John F. Kennedy Center for the Performing Arts, ARTSEDGE provides resources and examples for teachers to teach in, through and about the arts. The site includes lesson plans, advocacy and professional development resources, and up-to-date information on arts programs from around the world.

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Developed by the Council for Economic Education, EconEdLink provides teachers and students with lessons and classroom learning activities based on economics topics in the news and real-time economics data. EconEdLink content is designed to help integrate economic concepts across the curriculum as outlined in the Voluntary National Content Standards in Economics.

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Presented by the National Endowment for the Humanities, EDSITEment features lesson plans and additional classroom resources about art and culture, literature and language arts, foreign language, history and social studies. It also serves as a gateway to the best humanities sites on the Web and features a monthly theme-based teaching resource calendar.

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Designed by The National Council of Teachers of Mathematics (NCTM), Illuminations is the comprehensive source for instruction and learning materials based on NCTM's Principles and Standards for School Mathematics. The site makes math engaging, interesting and challenging through interactive applets, standards-based lesson plans and other teacher resources.

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Developed by the National Geographic Society, the National Geographic Education site brings geography, social studies, and science to life for educators, learners, and their families—in and out of the classroom. The free education resources at NatGeoEd.org harness National Geographic’s iconic media, research, and exploration to support high-quality, standards-based instruction and student-centered learning. This next-generation site replaces Xpeditions, which is now an archive.

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ReadWriteThink, created by the International Reading Association (IRA) and the National Council of Teachers of English (NCTE), provides instructional practices and digital resources that support effective reading and language arts instruction for all learners.

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Developed by the American Association for the Advancement of Science, Science NetLinks provides resources for K-12 teachers and students. The site includes lesson plans, interactives, hands-on activities and reviewed resources, all of which provide opportunities to bring science and technology discovery into the classroom. Science NetLinks resources are matched to Project 2061's Benchmarks for Science Literacy.

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Designed and developed by the Smithsonian's National Museum of American History, the Smithsonian's History Explorer is a gateway to innovative, standards-based online resources for teaching and learning American history. The site brings history to life through artifacts, primary sources and online tools for the classroom, afterschool activities and home.

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Developed by the National Center for Family Literacy (NCFL), Wonderopolis helps families discover the wonders of learning in everyday life. The daily Wonder of the Day feature offers bite-size bits of learning for families to explore together. With its question-and-answer format, the Wonder of the Day provides a nugget of information about the title question, suggests a family-friendly activity to extend the learning, and lists vocabulary words and additional resources to take the learning even further.

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