What is Khan academy: Definition and 74 Discussions

Khan Academy is an American non-profit educational organization created in 2006 by Sal Khan, with the goal of creating a set of online tools that help educate students. The organization produces short lessons in the form of videos. Its website also includes supplementary practice exercises and materials for educators. All resources are available for free to users of the website and application.

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  1. How to write basic expressions with variables | 6th grade | Khan Academy

    How to write basic expressions with variables | 6th grade | Khan Academy

    Learn how to write basic algebraic expressions. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-sixth-grade-m...
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    • Category: Basic Algebra
  2. How to write expressions with variables | Introduction to algebra | Algebra I | Khan Academy

    How to write expressions with variables | Introduction to algebra | Algebra I | Khan Academy

    Learn how to write simple algebraic expressions. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/introdu...
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    • algebra i expressions khan academy sal khan
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    • Category: Basic Algebra
  3. How to write algebraic expressions with parentheses | Algebra I | Khan Academy

    How to write algebraic expressions with parentheses | Algebra I | Khan Academy

    Learn how to write algebraic expressions that involve grouping quantities in parentheses. Practice this lesson yourself on KhanAcademy.org right now: https:/...
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    • algebra i expressions khan academy sal khan
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    • Category: Basic Algebra
  4. Dependent and independent variables exercise: the basics | Algebra I | Khan Academy

    Dependent and independent variables exercise: the basics | Algebra I | Khan Academy

    Here we have a problem that asks us to identify which variables are dependent and independent. Hint: independent variables are not influenced and remain unch...
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    • algebra i dependent variables independent variables khan academy sal khan
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    • Category: Basic Algebra
  5. Dependent and independent variables exercise: graphing the equation | Algebra I | Khan Academy

    Dependent and independent variables exercise: graphing the equation | Algebra I | Khan Academy

    It's helpful to express an equation on a graph where we plot at least 2 points. Watch and we'll show you. Practice this lesson yourself on KhanAcademy.org ri...
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    • algebra i dependent variables independent variables khan academy sal khan
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    • Category: Basic Algebra
  6. Dependent and independent variables exercise: express the graph as an equation | Khan Academy

    Dependent and independent variables exercise: express the graph as an equation | Khan Academy

    We're flipping the last video on its head and doing the opposite. This time we give you the graph and ask you to express it as an equation. Practice this les...
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    • algebra i dependent variables independent variables khan academy sal khan
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    • Category: Basic Algebra
  7. Combining like terms introduction | Introduction to algebra | Algebra I | Khan Academy

    Combining like terms introduction | Introduction to algebra | Algebra I | Khan Academy

    In simple addition we learned to add all the numbers together to get a sum. In algebra, numbers are sometimes attached to variables and we need to make sure ...
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    • Category: Basic Algebra
  8. How to simplify an expression by combining like terms and the distributive property | Khan Academy - YouTube

    How to simplify an expression by combining like terms and the distributive property | Khan Academy - YouTube

    We've learned about order of operations and combining like terms. Let's layer the distributive property on top of this. Practice this lesson yourself on Khan...
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    • Category: Basic Algebra
  9. Combining like terms, but more complicated | Introduction to algebra | Algebra I | Khan Academy

    Combining like terms, but more complicated | Introduction to algebra | Algebra I | Khan Academy

    This example of combining like terms in an expression gets a little hairy. Listen closely. Practice this lesson yourself on KhanAcademy.org right now: https:...
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    • Category: Basic Algebra
  10. Examples of simplifying expressions involving rational numbers |7th grade | Khan Academy

    Examples of simplifying expressions involving rational numbers |7th grade | Khan Academy

    Learn how to simplify algebraic expressions by combining like terms. The expressions in this video have decimal and fraction coefficients. Practice this less...
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    • Category: Basic Algebra
  11. How to find equivalent expressions by combining like terms and using the distributive property

    How to find equivalent expressions by combining like terms and using the distributive property

    "Equivalent algebraic expressions exercise Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-sixth-grade-math/c...
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    • algebra i expressions khan academy sal khan
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    • Category: Basic Algebra
  12. Interpreting linear expressions, 1 | Introduction to algebra | Algebra I | Khan Academy

    Interpreting linear expressions, 1 | Introduction to algebra | Algebra I | Khan Academy

    We match the expressions to their meaning in this example. We're reinforcing our knowledge of linear expressions. Practice this lesson yourself on KhanAcadem...
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    • Category: Basic Algebra
  13. Interpreting linear expressions, 2 | Introduction to algebra | Algebra I | Khan Academy

    Interpreting linear expressions, 2 | Introduction to algebra | Algebra I | Khan Academy

    Let's practice matching expressions to their meaning in this example of interpreting linear expressions. Practice this lesson yourself on KhanAcademy.org rig...
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    • Category: Basic Algebra
  14. Why dividing by zero is undefined | Functions and their graphs | Algebra II | Khan Academy

    Why dividing by zero is undefined | Functions and their graphs | Algebra II | Khan Academy

    Watch the next lesson: https://www.khanacademy.org/math/algebra2/functions_and_graphs/undefined_indeterminate/v/why-zero-divided-by-zero-is-undefined-indeter...
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    • algebra i division by zero khan academy sal khan
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  15. Why zero divided by zero is undefined/indeterminate | Algebra II | Khan Academy - YouTube

    Why zero divided by zero is undefined/indeterminate | Algebra II | Khan Academy - YouTube

    Multiple arguments for what we could get when we divide zero by zero. We will later see that this can be considered indeterminate Watch the next lesson: http...
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  16. Origins of algebra | Introduction to algebra | Algebra I | Khan Academy

    Origins of algebra | Introduction to algebra | Algebra I | Khan Academy

    Where did the word "Algebra" and its underlying ideas come from? Watch the next lesson: https://www.khanacademy.org/math/algebra/introduction-to-algebra/over...
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    • Category: Basic Algebra
  17. Alanay

    Studying How far will Khan Academy take me?

    So in September of 2016 I will start college for science & engineering, which will be mostly studying physics, engineering and a little chemistry. I've been studying on Khan Academy for the past few weeks, with the help of some friends online I've been passing all the practices pretty easily...
  18. The PAQI Monsta

    Other Khan Academy vs. Textbooks: Which is Better for Pre-University Math Review?

    Should I use khan academy or just by a textbook to learn and review some pre-uni & 1st year undergrad level mathematics for a physics degree? Which would be more fluid and clearer? Is there questions for khan academy? Is a maths books on mechanics relevant, or will any good physics book teach me...
  19. A

    Khan Academy for Undergraduate Physics

    I'm sure I'm not alone, but I personally love the way that the Khan Academy site is structured and how it gives incentives to users to continue learning. However, a lot of the material for physics and math is at a high school level. I was wondering if anybody knew of any online resources...
  20. Y

    Need exercises to accompany Khan academy

    I have been watching Khan academy, trying to teach myself physics but have realized I have no way to test what I have learned. I would be really grateful if anyone could give me a link to somewhere I could test myself. Thank you
  21. H

    Is Khan Academy a good source for self-learning?

    When professors are insufficient or don't teach very well, is Khan Academy a good alternative to learning topics such as calculus/differential equations, etc. as well as the sciences (bio, chem, physics)? I can't tell if the content is good resource material because I'm not an expert on any of...
  22. Pengwuino

    Is There a Khan Academy for Cooking?

    Khan academy... but for cooking? You know what would be epic genius pants? Like, a khan aacademy type website, but for cooking. Where they take people through even the most simplest of task like boiling water and opening bottles. I wonder if such a place exists? DISCUSS! oh and a site...
  23. M

    Is There a Calculation Error in Khan Academy's Projectile Motion Video?

    Homework Statement http://www.khanacademy.org/video/2-dimensional-projectile-motion--part-3?playlist=Physics Skip video to 4:40. He says that the average velocity in the horizonatal direction is the same as the initial velocity (7.07m/s) because it doesn't change. but wouldn't the velocity...
  24. H

    Khan Academy Videos: Math & Physics Lessons

    I'm wondering if anyone else has came across this site, its covers a wide range of maths topics and some physics as well. The lessons are in a video format and are hosted on Youtube. http://www.khanacademy.org/"
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