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Khan Academy | Free Online Courses, Lessons & Practice
Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of …
Everything You Need for Science Class—Free on Khan Academy
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.
Welcome to organic chemistry | Khan Academy
Unit 1 Welcome to organic chemistry Unit 2 Chemical Bonding (Hybridization) Unit 3 Revising functional groups Unit 4 Common Oxidising and Reducing Agents in Organic chemistry
Organic chemistry | Science | Khan Academy
In organic chemistry, we will learn about the reactions chemists use to synthesize crazy carbon based structures, as well as the analytical methods to characterize them.
Preparing to study biology (article) | Khan Academy
All biologists need to have some basic, foundational understanding of chemistry, physics, math, and statistics. But they don't have to become specialists in all these topics.
Free High School Science Activities - Khan Academy Blog
Our free, downloadable classroom activities are creative, hands-on, designed by experts, and easy for teachers to use. Best of all, they save you hours of planning time.
Organic chemistry course intro (video) | Khan Academy
From the food we eat to the clothes we wear, organic chemistry is everywhere. We'll explore the fascinating structures and reactions of carbon-based compounds, and see how they shape our …
Course overview (article) | Khan Academy
This course does not assume any prior programming experience, so it's suitable for complete beginners! It targets a high school level, but we also recommend it for adult learners or …
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