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130 courses

Electromagnetic Radiation: Free Physics Course — original WikiFree artwork depicting the course subject; Khan Academy.
Khan Academy Free Video

Electromagnetic Radiation: Free Physics Course

Explore the recorded foundations of electromagnetic radiation in this free Khan Academy physics course. All seven source videos are retained, covering waves, refraction, diffraction and interference, photoelectric…

IntermediateRead details
Grade 4 Reading Comprehension: Free Course — original WikiFree artwork depicting the course subject; Khan Academy.
Khan Academy Free Video

Grade 4 Reading Comprehension: Free Course

Strengthen focused reading-comprehension skills in this free Grade 4 course from Khan Academy. All seven source videos are included, covering text and performance comparisons, themes, accounts, informational…

Middle School Physics: Free Course — original WikiFree artwork depicting the course subject; Khan Academy.
Khan Academy Free Video

Middle School Physics: Free Course

Build a foundation in forces, motion, energy and waves with this free middle-school physics course from Khan Academy. Every recording in the eighteen-video source sequence is included,…

Middle School Chemistry: Free Course — original WikiFree artwork depicting the course subject; Khan Academy.
Khan Academy Free Video

Middle School Chemistry: Free Course

Explore matter and its changes in this free middle-school chemistry course from Khan Academy. The complete thirty-video teaching playlist is retained, covering atoms, elements, compounds, mixtures, physical…

Algebra 2: Free Course — original WikiFree artwork depicting the course subject; Khan Academy.
Khan Academy Free Video

Algebra 2: Free Course

Build a broad Algebra 2 foundation through this free Khan Academy course. All two hundred source videos are preserved across the twelve published topic groups, from polynomial…

IntermediateRead details