Reading comprehension, vocabulary, grammar, and foundational writing skills for 6th grade.

Adaptive grammar and writing practice — master punctuation, usage, and style with personalized exercises.

Adaptive vocabulary building with definitions, examples, and games that actually make words stick.

Free reading passages with guided questions — fiction, nonfiction, poetry by grade level.

Rock cycle, plate tectonics, atmosphere, weather, and Earth systems — full middle school earth science.

NASA's free educational resources — space science, Earth science, engineering challenges, and STEM activities.

Thousands of free educational videos and interactive media from PBS covering science, history, and ELA.

Ancient civilizations through modern history — Egypt, Greece, Rome, Middle Ages, and beyond.

Free encyclopedia of world history — expert-written articles, maps, timelines, and primary sources.

Geography, culture, and history resources from National Geographic — maps, articles, and videos.

Atoms, periodic table, bonding, reactions, stoichiometry, and gases — full high school chemistry.

The best interactive periodic table — click any element for properties, electron configurations, and orbital diagrams.

Virtual chemistry labs — build molecules, run reactions, explore acid-base equilibrium. Completely free.

Kinematics, Newton's laws, energy, waves, electricity, and magnetism — full high school physics.

Simulate forces, circuits, projectile motion, and waves — free virtual physics lab from University of Colorado.

Tutorials, animations, and practice problems for every high school physics topic — very student-friendly.

Cells, photosynthesis, respiration, genetics, ecology, and evolution — complete high school biology.

Award-winning biology resources — films, animations, data activities, and virtual labs from world-class scientists.

Interactive animations of cell division, immune response, and cell structure — great for visual learners.

Free coding courses for all ages — Scratch, block coding, Python, and JavaScript. Perfect for beginners.

Create interactive stories, games, and animations using block-based programming. Free from MIT Media Lab.