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Free collection of audiobooks and short stories as downloadable MP3s with text passages and reading strategies, from the University of South Florida. Supports fluency and listening comprehension.

Adaptive grammar and writing practice that uses students' interests to build skills, with diagnostics and teacher assignments. A free plan is available, with paid tiers for more features.

Free writing lab from Purdue University with guides on grammar, research, citation styles (MLA, APA, Chicago), and the writing process. A standard reference for secondary writing instruction.

Free educational video series covering world history, U.S. history, government, science, literature, and more, with study guides and teacher resources. Engaging overviews for flipped or supplemental…

Free map quizzes for learning countries, capitals, states, flags, and landmarks around the world, with many difficulty levels. Quick geography practice for any grade.

Nonprofit, free reference with articles, timelines, maps, and images covering world history from prehistory onward. A good starting point for student research.

Free interactive text of the U.S. Constitution, with essays from scholars across the political spectrum explaining each clause and where interpretations differ.

Free videos, games, and lesson plans on the Constitution, the courts, and civic engagement from the Annenberg Public Policy Center.

Free primary sources, lesson plans, essays, and videos on American history for teachers and students, drawn from a major collection of historical documents.

The National Archives' free teaching site with thousands of primary source documents, ready-made activities, and tools for building your own document-based lessons.

Presentation tool for live polls, word clouds, quizzes, and Q&A that students answer from their devices. A free plan is available with limits on questions per presentation.

Web-based tool for creating interactive assignments with many question types, including drawing and short response, and seeing student responses live. A free plan is available.