Learn how to compare whole numbers. The numbers used in this video are 394 and 397.
Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-place-value-topic/cc-early-math-three-digit-compare/e/comparing-numbers-within-1000?utm_source=YT&utm_medium=Desc&utm_campaign=EarlyMath
Watch the next lesson: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-20/cc-early-math-add-20/v/adding-within-20?utm_source=YT&utm_medium=Desc&utm_campaign=EarlyMath
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https://www.khanacademy.org/math/early-math/cc-early-math-place-value-topic/cc-early-math-tens/v/rep-quantity-with-digits?utm_source=YT&utm_medium=Desc&utm_campaign=EarlyMath
Early Math on Khan Academy: Math begins with counting. It's the most important skill we learn in our early years and becomes the foundation for all other math concepts. Once we can count, we can add, subtract, and measure the world around us. Shortly thereafter, we can learn about place values, plots, graphs, time, money, and shapes. These early math skills are presented in this subject's tutorials in a straightforward, understandable, and (dare we say it) fun way!
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https://www.youtube.com/watch?v=9Jg5S7F2SMQ
Note: All Khan Academy content is available for free at (www.khanacademy.org)
Practice this lesson yourself on KhanAcademy.org right now:
https://www.khanacademy.org/math/geometry/basic-geometry/cross-sections/e/rotate-2d-shapes-to-make-3d-objects?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry
Watch the next lesson: https://www.khanacademy.org/math/geometry/cc-geometry-circles/circles/v/language-and-notation-of-the-circle?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry
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https://www.khanacademy.org/math/geometry/basic-geometry/cross-sections/v/ways-to-cut-a-cube?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry
Geometry on Khan Academy: We are surrounded by space. And that space contains lots of things. And these things have shapes. In geometry we are concerned with the nature of these shapes, how we define them, and what they teach us about the world at large--from math to architecture to biology to astronomy (and everything in between). Learning geometry is about more than just taking your medicine ("It's good for you!"), it's at the core of everything that exists--including you. Having said all that, some of the specific topics we'll cover include angles, intersecting lines, right triangles, perimeter, area, volume, circles, triangles, quadrilaterals, analytic geometry, and geometric constructions. Wow. That's a lot. To summarize: it's difficult to imagine any area of math that is more widely used than geometry.
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https://www.youtube.com/watch?v=vdpyWeiHXmU
Note: All Khan Academy content is available for free at (www.khanacademy.org)
Practice this lesson yourself on KhanAcademy.org right now:
https://www.khanacademy.org/math/algebra2/functions_and_graphs/comparing-interpreting-functions/e/comparing-features-of-functions-2?utm_source=YT&utm_medium=Desc&utm_campaign=AlgebraII
Watch the next lesson: https://www.khanacademy.org/math/algebra2/functions_and_graphs/one-variable-modeling/v/making-more-pizzas-to-spread-cost-per-pizza?utm_source=YT&utm_medium=Desc&utm_campaign=AlgebraII
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https://www.khanacademy.org/math/algebra2/functions_and_graphs/comparing-interpreting-functions/v/comparing-features-of-functions-2-example-2?utm_source=YT&utm_medium=Desc&utm_campaign=AlgebraII
Algebra II on Khan Academy: Your studies in algebra 1 have built a solid foundation from which you can explore linear equations, inequalities, and functions. In algebra 2 we build upon that foundation and not only extend our knowledge of algebra 1, but slowly become capable of tackling the BIG questions of the universe. We'll again touch on systems of equations, inequalities, and functions...but we'll also address exponential and logarithmic functions, logarithms, imaginary and complex numbers, conic sections, and matrices. Don't let these big words intimidate you. We're on this journey with you!
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https://www.youtube.com/watch?v=H1H0xmjZMPA
Note: All Khan Academy content is available for free at (www.khanacademy.org)
Introduction to using the periodic table to determine electron configurations
About Khan Academy: Khan Academy is a nonprofit with a mission to provide a free, world-class education for anyone, anywhere. We believe learners of all ages should have unlimited access to free educational content they can master at their own pace. We use intelligent software, deep data analytics and intuitive user interfaces to help students and teachers around the world. Our resources cover preschool through early college education, including math, biology, chemistry, physics, economics, finance, history, grammar and more. We offer free personalized SAT test prep in partnership with the test developer, the College Board. Khan Academy has been translated into dozens of languages, and 100 million people use our platform worldwide every year. For more information, visit www.khanacademy.org, join us on Facebook or follow us on Twitter at @khanacademy. And remember, you can learn anything.
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https://www.youtube.com/watch?v=RJlEH5Jz80w
Note: All Khan Academy content is available for free at (www.khanacademy.org)
Approximating cos(x) with a Maclaurin series (which is like a Taylor polynomial centered at x=0 with infinitely many terms). It turns out that this series is exactly the same as the function itself! Created by Sal Khan.
Watch the next lesson: https://www.khanacademy.org/math/ap-calculus-bc/bc-series/bc-maclaurin-series/v/sine-taylor-series-at-0-maclaurin?utm_source=YT&utm_medium=Desc&utm_campaign=APCalculusBC
Missed the previous lesson? https://www.khanacademy.org/math/ap-calculus-bc/bc-series/bc-taylor-series/v/evaluating-taylor-polynomial-of-derivative?utm_source=YT&utm_medium=Desc&utm_campaign=APCalculusBC
AP Calculus BC on Khan Academy: Learn AP Calculus BC - everything from AP Calculus AB plus a few extra goodies, such as Taylor series, to prepare you for the AP Test
About Khan Academy: Khan Academy is a nonprofit with a mission to provide a free, world-class education for anyone, anywhere. We believe learners of all ages should have unlimited access to free educational content they can master at their own pace. We use intelligent software, deep data analytics and intuitive user interfaces to help students and teachers around the world. Our resources cover preschool through early college education, including math, biology, chemistry, physics, economics, finance, history, grammar and more. We offer free personalized SAT test prep in partnership with the test developer, the College Board. Khan Academy has been translated into dozens of languages, and 100 million people use our platform worldwide every year. For more information, visit www.khanacademy.org, join us on Facebook or follow us on Twitter at @khanacademy. And remember, you can learn anything.
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https://www.youtube.com/watch?v=WWe7pZjc4s8
Note: All Khan Academy content is available for free at (www.khanacademy.org)
Human activities, such as the release of greenhouse gases from burning fossil fuels, are major factors in the current rise in Earth’s mean surface temperature (global warming). Reducing the level of climate change and reducing human vulnerability to whatever climate changes do occur depend on the understanding of climate science, engineering capabilities, and other kinds of knowledge, such as understanding of human behavior and on applying that knowledge wisely in decisions and
activities.
Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!
Donate or volunteer today! Donate here: https://www.khanacademy.org/donate
Volunteer here: https://www.khanacademy.org/contribute
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https://www.youtube.com/watch?v=z9xKxciHgo8
Note: All Khan Academy content is available for free at (www.khanacademy.org)
Introduction to molecular and empirical formulas. Calculating molecular mass.
More free lessons at: http://www.khanacademy.org/video?v=gfBcM3uvWfs
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https://www.youtube.com/watch?v=gfBcM3uvWfs
Note: All Khan Academy content is available for free at (www.khanacademy.org)
WATCH AN UPDATED VERSION OF THIS VIDEO AT https://www.youtube.com/watch?v=08zHioOVTd4
Thinking about where the graphs of sin and cos intersect.
Practice this lesson yourself on KhanAcademy.org right now:
https://www.khanacademy.org/math/trigonometry/trig-function-graphs/trig_graphs_tutorial/e/graphs_of_sine_and_cosine?utm_source=YT&utm_medium=Desc&utm_campaign=Trigonometry
Watch the next lesson: https://www.khanacademy.org/math/trigonometry/trig-function-graphs/trig_graphs_tutorial/v/example-amplitude-and-period-transformations?utm_source=YT&utm_medium=Desc&utm_campaign=Trigonometry
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https://www.youtube.com/watch?v=fp9DZYmiSC4
Note: All Khan Academy content is available for free at (www.khanacademy.org)
KA's US history fellow Kim talks about the trials of Reconstruction, when federal troops attempted to enforce the Fourteenth and Fifteenth Amendments in the South.
Watch the next lesson: https://www.khanacademy.org/humanities/us-history/the-gilded-age/south-after-civil-war/v/jim-crow-pt-4?utm_source=YT&utm_medium=Desc&utm_campaign=UShistory
Missed the previous lesson? https://www.khanacademy.org/humanities/us-history/the-gilded-age/south-after-civil-war/v/jim-crow-part-2?utm_source=YT&utm_medium=Desc&utm_campaign=UShistory
US history on Khan Academy: From a mosquito-ridden backwater to the world's last remaining superpower, the United States of America is a nation with a rich history and a noble goal: government of the people, by the people, for the people. Its citizens' struggle to achieve that goal is a dramatic story stretching over hundreds of years.
About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.
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https://www.youtube.com/watch?v=VhNouf_RdXs
Note: All Khan Academy content is available for free at (www.khanacademy.org)