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  1. 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 …

  2. Math - Khan Academy

    MAP Recommended Practice Use NWEA MAP Test scores to generate personalized study recommendations

  3. Official Digital SAT® Prep | Khan Academy

    High Quality Prep for every section of the digital SAT with guidance from Khan Academy’s team of math, reading, and writing experts. Free Access all of our digital SAT prep materials for …

  4. Science | Khan Academy

    Review the fundamentals of biochemistry, cell biology, genetics, evolution, and ecology, and develop scientific thinking skills as you explore the study of life.

  5. Chemistry archive | Science | Khan Academy

    Chemistry is the study of matter and the changes it undergoes.

  6. Khan Academy | Khan Academy

    Oops. Something went wrong. Please try again. Uh oh, it looks like we ran into an error. You need to refresh. If this problem persists, tell us.

  7. Biology archive | Science | Khan Academy

    Unit 4: Energy and enzymes Energy in metabolism Laws of thermodynamics Free energy ATP and reaction coupling Introduction to enzymes Enzyme regulation

  8. Statistics and probability - Khan Academy

    Unit 6: Study design Unit mastery: 0% Statistical questions Sampling and observational studies Sampling methods Types of studies (experimental vs. observational) Experiments

  9. MCAT | Test prep | Khan Academy

    All materials are categorized according to the pre-health competencies tested by the new MCAT exam; however, the content in this collection is not intended to prescribe a program of study …

  10. 9th grade reading & vocabulary - Khan Academy

    ELA practice and instruction for 9th grade, covering reading comprehension and vocabulary. Aligned to Common Core State Standards for Reading: Literature; Reading: Informational …