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WEBSITE: http://www.teachertube.com/math

An animated movie on the development of numbers throughout history.

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/ma....th/ap-calculus-ab/ab

Once you find a critical point, how can you tell if it is a minimum, maximum or neither? Created by Sal Khan.

Watch the next lesson: https://www.khanacademy.org/math/ap-calculus-ab/ab-derivatives-analyze-functions/ab-find-rel-extrema/v/finding-relative-maximum-example?utm_source=YT&utm_medium=Desc&utm_campaign=APCalculusAB

Missed the previous lesson? https://www.khanacademy.org/math/ap-calculus-ab/ab-derivatives-analyze-functions/ab-critical-points/v/finding-increasing-interval-given-derivative?utm_source=YT&utm_medium=Desc&utm_campaign=APCalculusAB

AP Calculus AB on Khan Academy: Bill Scott uses Khan Academy to teach AP Calculus at Phillips Academy in Andover, Massachusetts, and heÕs part of the teaching team that helped develop Khan AcademyÕs AP lessons. Phillips Academy was one of the first schools to teach AP nearly 60 years ago.

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.

For free. For everyone. Forever. #YouCanLearnAnything

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In this video, we are revisiting the big book we read yesterday, to add more to our words by creating another sentence together. The students are chosen by using their words their way data and sight word knowledge.

In our Cultures of the world video we will learn about what culture means and how cultures can be very different around the world. We will learn how to appreciate the differences and how they influence our own identities. We will explore the American culture, French, Chinese, and many other cultures around the world.

Looking for more Cultures of the World resources? Download our free comprehensive lesson plan here: https://learnbright.org/lesson....s/social-studies/cul

Check out some of our other culture-related videos here:
Europe: https://youtu.be/XZtZRw7zrqI
Asia: https://youtu.be/1pNBDTNVhCw
Africa: https://youtu.be/KcNVNsvyFfA
Australia: https://youtu.be/zmon5Tv6bYU
China: https://youtu.be/q7JK5Vxf_VQ
North America: https://youtu.be/JZk6_dgA9uQ
South America: https://youtu.be/Z4iwEMbal24
Mexico: https://youtu.be/hmhLgM9uGN0

Thank you for watching and learning with us! We’re constantly releasing new content and videos so click that “Subscribe” button and you’ll notified.

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*Teachers and Parents! Did you know? In addition to these great videos, we have also created a library of high quality and engaging lessons for your elementary aged student(s). Visit us, sign up for a free account, and instantly you'll have access to thousands of lesson plans, learning materials, teaching instructions, activities, and assignments that your kids will really enjoy! We hope to see you soon!

Browse our entire collection of Social Studies lesson plans: https://learnbright.org/lessons/?filter_subject=social-studies

#ASL
#WorldCulture
#Cultures

How to measure an Angle in Geogebra

Graphing a parabola with a table of values

Practice this lesson yourself on KhanAcademy.org right now:
https://www.khanacademy.org/math/algebra/quadratics/solving_graphing_quadratics/e/graphing_parabolas_0.5?utm_source=YT&utm_medium=Desc&utm_campaign=AlgebraI

Watch the next lesson: https://www.khanacademy.org/math/algebra/quadratics/solving_graphing_quadratics/v/quadratic-functions-2?utm_source=YT&utm_medium=Desc&utm_campaign=AlgebraI

Missed the previous lesson?
https://www.khanacademy.org/math/algebra/quadratics/features-of-quadratic-functions/v/modeling-mosquitos-with-quadratics?utm_source=YT&utm_medium=Desc&utm_campaign=AlgebraI

Algebra I on Khan Academy: Algebra is the language through which we describe patterns. Think of it as a shorthand, of sorts. As opposed to having to do something over and over again, algebra gives you a simple way to express that repetitive process. It's also seen as a "gatekeeper" subject. Once you achieve an understanding of algebra, the higher-level math subjects become accessible to you. Without it, it's impossible to move forward. It's used by people with lots of different jobs, like carpentry, engineering, and fashion design. In these tutorials, we'll cover a lot of ground. Some of the topics include linear equations, linear inequalities, linear functions, systems of equations, factoring expressions, quadratic expressions, exponents, functions, and ratios.

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.

For free. For everyone. Forever. #YouCanLearnAnything

Subscribe to Khan Academy’s Algebra channel:
https://www.youtube.com/channe....l/UCYZrCV8PNENpJt36V
Subscribe to Khan Academy: https://www.youtube.com/subscr....iption_center?add_us

Have you ever wondered how your body breathes and converts carbon dioxide to oxygen? In The Respiratory System for Kids video, you will learn how exactly we do this. You will also learn about the other components and functions of this important body system. All living things need oxygen to survive. As humans, we use our lungs and other parts of the body to breathe properly and receive oxygen.

Our lungs take up most of the space in our chest, and our ribs are there to protect them and the heart. Speaking of the heart, the left lung is smaller than the right so that there's more room for the heart! On the outside, lungs are pink, spongelike, and kind of squishy. Another fun fact: Yawning is a sign that the body needs more oxygen. When we get sleepy, the brain sends a particular signal in tell our lungs to breathe in more air.

Have you ever noticed that you can breathe through both your mouth and your nose? If we breathe through the nose, the air gets filtered by tiny hairs called cilia. These hairs line the passageways of the nose to filter out dust and other substances. The air travels down the trachea, or windpipe, which is also lined with cilia.

The pharynx, which is actually part of both the respiratory and digestive systems, carries food and air divided into two pathways. The esophagus is for food and leads to the stomach. Air travels through the larynx (voice box) that leads to the trachea. At the back of the throat area is a flap of tissue called an epiglottis. The epiglottis covers the air-only passage when we swallow to keep food or drink out of the windpipe. Keep watching to learn more.

We hope you and your student(s) enjoyed learning about this important body system! If you want to learn even more, head over to our website and download one of our many free lesson plans about the human body and how it works, full of activities, worksheets, and more!

https://learnbright.org/lesson....s/science/the-respir

What you will learn in Respiratory System for Kids:
0:00 Introduction to the lungs
0:32 Main purpose of the respiratory system
1:10 How lungs function
2:06 Information about the diaphragm
3:02 The nose, mouth, pharynx, and trachea
4:07 The epiglottis, bronchi, and bronchioles
5:13 Alveoli and the exchange of oxygen and carbon dioxide
6:58 Review of the facts

Thank you for watching and learning with us! We’re constantly releasing new content and videos, so click that “Subscribe” button and you’ll get notified.

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*Teachers and Parents! Did you know? In addition to these great videos, we have also created a library of high-quality and engaging lessons for your elementary aged student(s). Visit us, sign up for a free account, and instantly you'll have access to thousands of lesson plans, learning materials, teaching instructions, activities, and assignments that your kids will really enjoy! We hope to see you soon!

Browse our entire collection of Science lesson plans: https://learnbright.org/lessons/?filter_subject=science

#RespiratorySystem
#Breathing

Welcome to The Fraction Review with Mr. J! Need help with how to add, subtract, multiply, or divide fractions? You're in the right place!

If you're looking for a quick refresher on fractions, this is the video for you. Mr. J will go through an adding fractions, subtracting fractions, multiplying fractions, and dividing fractions example (fraction operations) and explain the steps of each.

Looking for a more in depth explanation?
Adding and Subtracting Fractions Instructional Video: https://youtu.be/xNsyNwAkqfk
Multiplying Fractions Instructional Video: https://youtu.be/-sxfriO_IV0
Dividing Fractions Instructional Video: https://youtu.be/yKCBspYtrSU

About Math with Mr. J: This channel offers instructional videos that are directly aligned with math standards. Teachers, parents/guardians, and students from around the world have used this channel to help with math content in many different ways. All material is absolutely free.

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Email: math5.mrj@gmail.com

Music: https://www.bensound.com/royalty-free-music


Hopefully this video is what you're looking for when it comes to a fraction review and helps you with adding, subtracting, multiplying, and dividing fractions.

Have a great rest of your day and thanks again for watching!

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/ma....th/cc-sixth-grade-ma


"Learn how to solve equations in one step by multiplying or dividing a number from both sides. These problems involve decimals and fractions.

Grade 6th on Khan Academy: By the 6th grade, you're becoming a sophisticated mathemagician. You'll be able to add, subtract, multiply, and divide any non-negative numbers (including decimals and fractions) that any grumpy ogre throws at you. Mind-blowing ideas like exponents (you saw these briefly in the 5th grade), ratios, percents, negative numbers, and variable expressions will start being in your comfort zone. Most importantly, the algebraic side of mathematics is a whole new kind of fun! And if that is not enough, we are going to continue with our understanding of ideas like the coordinate plane (from 5th grade) and area while beginning to derive meaning from data! (Content was selected for this grade level based on a typical curriculum in the United States.)

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.

For free. For everyone. Forever. #YouCanLearnAnything

Subscribe to Khan Academy’s 6th grade channel:
https://www.youtube.com/channe....l/UCnif494Ay2S-PuYlD
Subscribe to Khan Academy: https://www.youtube.com/subscr....iption_center?add_us
"

#fastmathtricks
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#mathtrick This math trick is pretty easy to do, and can be done in your head faster than a calculator.
This trick only works when multiplying numbers that both end in five. A couple of simple steps and you're done!
In addition, the mathematical reasons why this trick work are simply explained at the end of the video.

To support tecmath on Patreon: https://www.patreon.com/tecmath To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU
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Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/ma....th/algebra/x2f8bb115

Imran is 18. Diya is 2. How many years will it take for Imran to be 3 times as old as Diya?

Practice this lesson yourself on KhanAcademy.org right now:
https://www.khanacademy.org/math/algebra/solving-linear-equations-and-inequalities/age_word_problems_tut/e/age_word_problems?utm_source=YT&utm_medium=Desc&utm_campaign=AlgebraI

Watch the next lesson: https://www.khanacademy.org/math/algebra/solving-linear-equations-and-inequalities/age_word_problems_tut/v/ex-2-age-word-problem?utm_source=YT&utm_medium=Desc&utm_campaign=AlgebraI

Missed the previous lesson?
https://www.khanacademy.org/math/algebra/solving-linear-equations-and-inequalities/conv_rep_decimals/v/coverting-repeating-decimals-to-fractions-2?utm_source=YT&utm_medium=Desc&utm_campaign=AlgebraI

Algebra I on Khan Academy: Algebra is the language through which we describe patterns. Think of it as a shorthand, of sorts. As opposed to having to do something over and over again, algebra gives you a simple way to express that repetitive process. It's also seen as a "gatekeeper" subject. Once you achieve an understanding of algebra, the higher-level math subjects become accessible to you. Without it, it's impossible to move forward. It's used by people with lots of different jobs, like carpentry, engineering, and fashion design. In these tutorials, we'll cover a lot of ground. Some of the topics include linear equations, linear inequalities, linear functions, systems of equations, factoring expressions, quadratic expressions, exponents, functions, and ratios.

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.

For free. For everyone. Forever. #YouCanLearnAnything

Subscribe to Khan Academy’s Algebra channel:
https://www.youtube.com/channe....l/UCYZrCV8PNENpJt36V
Subscribe to Khan Academy: https://www.youtube.com/subscr....iption_center?add_us

Sometimes it's really hard to understand a particular topic. You spend hours and hours on it and it just doesn't click. In this video I talk about what you should do when this happens. I hope this helps someone.

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Thank you:)

On this lesson, you will learn how to use area model multiplication to solve multiplicative comparison word problems!

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Multiply or divide to solve word problems involving multiplicative comparison, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem, distinguishing multiplicative comparison from additive comparison.

What is multiplicative comparison?
How do I teach kids to use area models?
How do I multiply using an area model?
How do I practice using setting up area models?
How can students use area models for multiplication?

Peck flew to the pool to swim with Reya! The letters "e" and "w" team up to make the long /ū/ sound. The letters "o" and "o" team up to make the long /ū/ sound too. Learn about vowel teams with Reya the Red Panda from Khan Academy Kids.

Visit us at http://www.khankids.org to learn more about Khan Academy Kids, a free educational app for preschool through 2nd grade.

Available on Google Play, Apple, and Amazon app stores:
➡️ http://khan.co/KhanKids-YT-Google
➡️ http://khan.co/KhanKids-YT-Apple
➡️ http://khan.co/KhanKids-YT-Amazon

You can access other videos about vowel teams on our playlist here: http://khan.co/KhanKids-VowelTeams.

Subscribe to our channel for more videos like this.

How many legs does a millipede have? I also cover the difference between a millipede and a centipede. Although their name would suggest that millipedes have 1000 legs, this number varies according to the number of segments the millipede has. Millipedes do have four legs per segment.

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/ma....th/algebra2/x2ec2f6f

Practice this lesson yourself on KhanAcademy.org right now:
https://www.khanacademy.org/math/precalculus/imaginary_complex_precalc/complex_num_precalc/e/the_complex_plane?utm_source=YT&utm_medium=Desc&utm_campaign=Precalculus

Watch the next lesson: https://www.khanacademy.org/math/precalculus/imaginary_complex_precalc/complex_num_precalc/v/complex-number-addition?utm_source=YT&utm_medium=Desc&utm_campaign=Precalculus

Missed the previous lesson?
https://www.khanacademy.org/math/precalculus/imaginary_complex_precalc/complex_num_precalc/v/complex-number-intro?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.

For free. For everyone. Forever. #YouCanLearnAnything

Subscribe to Khan Academy’s Precalculus channel:
https://www.youtube.com/channe....l/UCBeHztHRWuVvnlwm2
Subscribe to Khan Academy: https://www.youtube.com/subscr....iption_center?add_us

The above are candidate problems. Teachers and mathematicians are gathering in November 2013 to select the final set of thirteen unsolved problems. The results are here:
http://www.youtube.com/watch?v=wV5-wMGRM3g&feature=share&list=PLSrbLTVLJpchKVD0uUOEa2S-eSK9a3Kxp

When: November 15-17 2013
Where: Banff International Research Station

The conference will also discuss whether the $1,000,000 rewards are a good or bad idea. People have strong opinions on the topic. Some see no other practical way of getting these beautiful problems the exposure they need to inspire students worldwide. However, there are problems:

1) The joy of learning for its own sake may be compromised if the ulterior motive of a cash reward gets into the classroom.

2) The Clay Mathematics Institute released the seven $1,000,000 Millenium problems in 2000. Their purpose is to inspire mathematicians and the problems are tough to understand for non-mathematicians. Here is the problem... Nick Woodhouse says that the Clay Mathematics Institute gets about six wrong solutions every day! We need a different mechanism for dealing with "solutions" so we are not inundated.

3) The system that is set up must also try to minimize legal challenges. Again, the Clay Mathematics Institute has had its fair share of bad experiences here.

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For those coming to the November 2013 conference... If you are able, think of some unsolved problems that may be understood by a typical classroom of students. The educators at the conference will help place these into the curriculum and develop them so every child experiences both moments of success and moments of struggle. We need to deliver a sense of accomplishment for all children as they come to understand and work on the unsolved problem.

For example, one potential grade 4 problem is the Collatz (3N+1) conjecture. This unsolved conjecture can be paired with the (3N-1) conjecture which is consistently solved by all grade 4 classrooms: http://youtu.be/R4oINmqHXVY

Here are other potential unsolved problems:

Kindergarten: Packing Squares (Erdős and Graham, 1975)
Grade 1: No-Thee-in-a-Line (Henry Dudeney, 1917)
Grade 2: Sum-Free Partitions (Issai Schur, 1916)
Grade 3: Graceful Tree Conjecture (Ringel, Kotzig & Rosa, 1967)
Grade 4: Collatz Conjecture (Lothar Collatz, 1937)
Grade 5: Play Perudo Perfectly (Atahualpa & Pizarro, 1530s)
Grade 6: RSA Cipher (Rivest, Shamir & Aldeman, 1978)
Grade 7: Egyptian Fraction problem ???
Grade 8: Problem using the Pythagorean Theorem ???
Grade 9: Exponents problem or Three-Body-Problem (D'Alembert & Clairaut, 1747) ???
Grade 10: Inscribed Square Jordan Curve (Otto Toeplitz 1911)
Grade 11: Solutions to x^2 + y^2 + z^2 = 3xyz (Markoff, 1879) ???
Grade 12: ??? (The Sudoku problem on the video above has been solved.)

Here is a tentative list of criteria that you might consider in thinking about suitable unsolved problems: http://www.mathpickle.com/K-12/Criteria.html