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. ... https://www.youtube.com/watch?v=E2VxbufzuWQ
Lindsay finds the area of an irregular shape by decomposing it into 2 rectangles and subtracting the area of the rectangles.
Practice this yourself on Khan Academy right now: https://www.khanacademy.org/math/cc-third-grade-math/cc-third-grade-measurement/cc-third-grade-decompose-to-find-area/e/decompose-shapes-to-find-area
Watch the next lesson: https://www.khanacademy.org/math/cc-third-grade-math/cc-third-grade-measurement/cc-third-grade-decompose-to-find-area/v/calculating-the-square-footage-of-a-house
Missed the previous lesson? Watch here: https://www.khanacademy.org/math/pre-algebra/measurement/area-basics/v/area-of-rectangles-and-the-distributive-property
3rd grade math on Khan Academy: We know you've been rocking through 2nd grade adding and subtracting all kinds of whole numbers (up to 2 digits, right?). That's awesome! In 3rd grade math we want you to start using bigger numbers and start multiplying and dividing, too. By the way, did you know that some numbers aren’t actually “whole?” They’re “partially whole.” We call them fractions! We want you to start playing around and having fun with those, too. There's also area, perimeter, and place value to be discovered. Whew. We have so much to do and can't wait to do it with you. Let's go!
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https://www.youtube.com/watch?v=qS4stB9LfJA
Note: All Khan Academy content is available for free at (www.khanacademy.org)
Lewis electron-dot diagram and bond angles for ethanol
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https://www.youtube.com/watch?v=ImTwySWxA4U
Note: All Khan Academy content is available for free at (www.khanacademy.org)
Converting fractions to decimals sometimes requires us to brush up on our long division skills. We'll walk you through it.
Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/decimals-pre-alg/decimal-to-fraction-pre-alg/e/converting_fractions_to_decimals?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra
Watch the next lesson: https://www.khanacademy.org/math/pre-algebra/decimals-pre-alg/decimal-to-fraction-pre-alg/v/decimals-and-fractions?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra
Missed the previous lesson?
https://www.khanacademy.org/math/pre-algebra/decimals-pre-alg/decimal-to-fraction-pre-alg/v/converting-fractions-to-decimals?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra
Pre-Algebra on Khan Academy: No way, this isn't your run of the mill arithmetic. This is Pre-algebra. You're about to play with the professionals. Think of pre-algebra as a runway. You're the airplane and algebra is your sunny vacation destination. Without the runway you're not going anywhere. Seriously, the foundation for all higher mathematics is laid with many of the concepts that we will introduce to you here: negative numbers, absolute value, factors, multiples, decimals, and fractions to name a few. So buckle up and move your seat into the upright position. We're about to take off!
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https://www.youtube.com/watch?v=Y1V5mZaMfTk
Note: All Khan Academy content is available for free at (www.khanacademy.org)
Errors in triangle dilations
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https://www.youtube.com/watch?v=Kry9Bhp4PQg
Note: All Khan Academy content is available for free at (www.khanacademy.org)
Have questions about studying for the SAT and AP Exams during school closures? Adam Green from the Khan Academy content team will join Sal on Daily Homeroom this Monday at noon PT to offer expert advice for parents and students.
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=DzTRN7sfrmY
Note: All Khan Academy content is available for free at (www.khanacademy.org)
u13 l2 t3 we1 Perpendicular Line Slope
More free lessons at: http://www.khanacademy.org/video?v=ndPq7gbin7A
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https://www.youtube.com/watch?v=ndPq7gbin7A
Note: All Khan Academy content is available for free at (www.khanacademy.org)
Problems 13-16 on starting on page 778
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https://www.youtube.com/watch?v=lb3TmicdsCU
Note: All Khan Academy content is available for free at (www.khanacademy.org)
When using more than one adjective, sometimes you put a comma between them and sometimes you don't. Learn how to tell when you need a comma in this video!
Practice this yourself on Khan Academy right now: https://www.khanacademy.org/the-modifier/e/commas-and-adjectives
Watch the next lesson: https://www.khanacademy.org/humanities/grammar/partsofspeech/the-modifier/v/intro-to-the-comparative-and-the-superlative-v2
Missed the previous lesson? Watch here: https://www.khanacademy.org/humanities/grammar/partsofspeech/the-modifier/v/adjective-order
Punctuation on Khan Academy: Punctuation is the collection of squiggles, dots, and lines that we use to separate sentences and their parts. Is a question mark punctuation? Yes, and so is an exclamation point!
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https://www.youtube.com/watch?v=OfxiZdsqGeA
Note: All Khan Academy content is available for free at (www.khanacademy.org)
Using matrices to figure out if some combination of 2 vectors can create a 3rd vector
Watch the next lesson: https://www.khanacademy.org/math/precalculus/precalc-matrices/inverting_matrices/v/finding-the-determinant-of-a-3x3-matrix-method-1?utm_source=YT&utm_medium=Desc&utm_campaign=Precalculus
Missed the previous lesson?
https://www.khanacademy.org/math/precalculus/precalc-matrices/inverting_matrices/v/matrices-to-solve-a-system-of-equations?utm_source=YT&utm_medium=Desc&utm_campaign=Precalculus
Precalculus on Khan Academy: You may think that precalculus is simply the course you take before calculus. You would be right, of course, but that definition doesn't mean anything unless you have some knowledge of what calculus is. Let's keep it simple, shall we? Calculus is a conceptual framework which provides systematic techniques for solving problems. These problems are appropriately applicable to analytic geometry and algebra. Therefore....precalculus gives you the background for the mathematical concepts, problems, issues and techniques that appear in calculus, including trigonometry, functions, complex numbers, vectors, matrices, and others. There you have it ladies and gentlemen....an introduction to precalculus!
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=gsNgdVdAT1o