Explore science with Khan Academy's free courses, videos, and exercises in physics, chemistry, biology, and more for a world-class education.

Khan Academy offers free, world-class education in various subjects including math, science, and arts, aiming to make learning accessible for everyone globally.

Explore biology topics with Khan Academy, offering free resources to learn about cells, genetics, evolution, ecology, and more.

Aug 14, 2025 · Free, high-quality science resources for grades 6–12, including hands-on activities, simulations, and teacher tools—all aligned to NGSS, TEKS, and AP standards.

Jul 15, 2024 · Discover Khan Academy’s new TEKS-aligned high school science courses in biology, chemistry, and physics, funded by ExxonMobil Foundation. Designed for the 2024-25 school year, …

Learn about electricity, circuit theory, and introductory electronics. We also have sections that let you get down and dirty with household items, from building your own robot to videos where we disassemble …

Khan Academy ... Khan Academy

Apr 9, 2026 · While Khan Academy doesn't have a dedicated GED course, we offer a multitude of practice content which can help you or your students study for all 4 GED subject tests (Math, English …

Learn AP Biology using videos, articles, and AP-aligned multiple choice question practice. Review the fundamentals of biochemistry, cell biology, genetics, evolution, and ecology, and develop scientific …

It's a great, big universe out there. In this section of Khan Academy, you'll learn about the brain-bending vastness of time and space. We go from plate tectonics here on Earth to entire galaxies and beyond.