Practice this lesson yourself on KhanAcademy.org right now:
https://www.khanacademy.org/math/geometry/basic-geometry/cross-sections/e/cross-sections-of-3d-shapes?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry
Watch the next lesson: https://www.khanacademy.org/math/geometry/basic-geometry/cross-sections/v/rotating-2d-shapes-in-3d?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry
Missed the previous lesson?
https://www.khanacademy.org/math/geometry/basic-geometry/cross-sections/v/vertical-slice-of-rectangular-pyramid?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=aSokFEpoJFM
Note: All Khan Academy content is available for free at (www.khanacademy.org)
Let's practice matching expressions to their meaning in this example of interpreting linear expressions.
Practice this lesson yourself on KhanAcademy.org right now:
https://www.khanacademy.org/math/algebra/introduction-to-algebra/writing-expressions-tutorial/e/interpreting-expressions?utm_source=YT&utm_medium=Desc&utm_campaign=AlgebraI
Watch the next lesson: https://www.khanacademy.org/math/algebra/introduction-to-algebra/writing-expressions-tutorial/v/writing-expressions-3-exercise-example-1?utm_source=YT&utm_medium=Desc&utm_campaign=AlgebraI
Missed the previous lesson?
https://www.khanacademy.org/math/algebra/introduction-to-algebra/writing-expressions-tutorial/v/interpreting-linear-expressions-example?utm_source=YT&utm_medium=Desc&utm_campaign=AlgebraI
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https://www.youtube.com/watch?v=edVnqL2Z59A
Note: All Khan Academy content is available for free at (www.khanacademy.org)
See how a wire carrying a current creates a magnetic field. Created by Sal Khan.
Watch the next lesson: https://www.khanacademy.org/science/physics/magnetic-forces-and-magnetic-fields/magnetic-field-current-carrying-wire/v/magnetism-7?utm_source=YT&utm_medium=Desc&utm_campaign=physics
Missed the previous lesson? Watch the next lesson: https://www.khanacademy.org/science/physics/magnetic-forces-and-magnetic-fields/magnets-magnetic/v/magnetism-5?utm_source=YT&utm_medium=Desc&utm_campaign=physics
Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of trigonometry.
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=Ri557hvwhcM
Note: All Khan Academy content is available for free at (www.khanacademy.org)
How might we bridge the digital divide? John Stankey, CEO of AT&T, joins Sal on Homeroom this Tuesday, December 1 at 12:00 pm PT / 3:00 pm ET to discuss possible solutions and how better access to broadband can help students and teachers stay engaged in education.
For more information visit: keeplearning.khanacademy.org
Khan Academy is a nonprofit with a mission to provide a free, world-class education for anyone, anywhere. If you’d like to contribute, please visit:
https://www.khanacademy.org/donate?utm_source=youtube&utm_medium=live&utm_campaign=schoolclosers
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https://www.youtube.com/watch?v=ZX92IrP6OYA
Note: All Khan Academy content is available for free at (www.khanacademy.org)
Problems 19-20 starting on page 400
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https://www.youtube.com/watch?v=281GDzKgNIw
Note: All Khan Academy content is available for free at (www.khanacademy.org)
Transposes of sums and inverses
Watch the next lesson: https://www.khanacademy.org/math/linear-algebra/matrix_transformations/matrix_transpose/v/linear-algebra-transpose-of-a-vector?utm_source=YT&utm_medium=Desc&utm_campaign=LinearAlgebra
Missed the previous lesson?
https://www.khanacademy.org/math/linear-algebra/matrix_transformations/matrix_transpose/v/linear-algebra-transpose-of-a-matrix-product?utm_source=YT&utm_medium=Desc&utm_campaign=LinearAlgebra
Linear Algebra on Khan Academy: Have you ever wondered what the difference is between speed and velocity? Ever try to visualize in four dimensions or six or seven? Linear algebra describes things in two dimensions, but many of the concepts can be extended into three, four or more. Linear algebra implies two dimensional reasoning, however, the concepts covered in linear algebra provide the basis for multi-dimensional representations of mathematical reasoning. Matrices, vectors, vector spaces, transformations, eigenvectors/values all help us to visualize and understand multi dimensional concepts. This is an advanced course normally taken by science or engineering majors after taking at least two semesters of calculus (although calculus really isn't a prereq) so don't confuse this with regular high school algebra.
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=Br_8t58mdeI
Note: All Khan Academy content is available for free at (www.khanacademy.org)
Now we're visually plotting ordered pairs based on sequence relationships. The sequence is based on given rules. You're good at following rules, right? Of course you are!
Practice this lesson yourself on KhanAcademy.org right now:
https://www.khanacademy.org/math/cc-fifth-grade-math/cc-5th-algebraic-thinking/cc-5th-number-patterns/e/visualizing-and-interpreting-relationships-between-patterns?utm_source=YT&utm_medium=Desc&utm_campaign=5thgrade
This is the last video in our 5th grade subject! Now move on to our first video in 6th grade: https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-ratios-prop-topic/cc-6th-ratios-intro/v/ratios-intro?utm_source=YT&utm_medium=Desc&utm_campaign=5thgrade
Missed the previous lesson? https://www.khanacademy.org/math/cc-fifth-grade-math/cc-5th-algebraic-thinking/cc-5th-number-patterns/v/interpreting-and-graphing-relationships-between-patterns?utm_source=YT&utm_medium=Desc&utm_campaign=5thgrade
Grade 5th on Khan Academy: Whether you are a robot, possum, magic unicorn, or just a normal human being, 5th grade is incredible! You will deepen your knowledge of the decimals that you were first exposed to in 4th grade. In particular, you'll learn to do all the arithmetic operations--addition, subtraction, multiplication, division--with them and really understand what a decimal represents. This will be complemented by building your fraction muscles where you'll learn to add, subtract, and multiply any fractions (and begin to divide them). On the measurement front, you'll explore volume (or how much "space" something takes up) and continue the unit conversion journey begun in 4th grade. 5th grade is also the first time that you get exposed to the fundamental concept of graphing points on a coordinate plane, and you'll get a very brief exposure to the concept of exponents (when exploring "powers" of 10)! (Content was selected for this grade level based on a typical curriculum in the United States.)
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https://www.youtube.com/watch?v=mqsIJucBn6c
Note: All Khan Academy content is available for free at (www.khanacademy.org)
Given the graph of a skydiver's altitude, Sal finds the average rate of change in altitude over a given time interval.
Practice this lesson yourself on KhanAcademy.org right now:
https://www.khanacademy.org/math/algebra/algebra-functions/average-rate-of-change-word-problems/e/average-rate-of-change-word-problems?utm_source=YT&utm_medium=Desc&utm_campaign=AlgebraI
Watch the next lesson: https://www.khanacademy.org/math/algebra/sequences/introduction_to_sequences/v/explicit-and-recursive-definitions-of-sequences?utm_source=YT&utm_medium=Desc&utm_campaign=AlgebraI
Missed the previous lesson?
https://www.khanacademy.org/math/algebra/algebra-functions/average-rate-of-change-word-problems/v/average-rate-of-change-from-graph-word-problem?utm_source=YT&utm_medium=Desc&utm_campaign=AlgebraI
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https://www.youtube.com/watch?v=wmQdFLdxLYc
Note: All Khan Academy content is available for free at (www.khanacademy.org)
Plants reproduce in a variety of ways, sometimes depending on animal behavior and specialized features for reproduction.
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!
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https://www.youtube.com/watch?v=nJIRCDipw7o
Note: All Khan Academy content is available for free at (www.khanacademy.org)