I'm sure you've heard of Isaac Newton and maybe of some of his laws. Like, that thing about "equal and opposite reactions" and such. But what do his laws mean? And how do they help us understand the world around us? In this episode of Crash Course Physics, Shini talks to us about just that.

***
Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios

Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse

Thanks to the following Patrons for their generous monthly contributions that help keep Crash Course free for everyone forever:

Mark, Eric Kitchen, Jessica Wode, Jeffrey Thompson, Steve Marshall, Moritz Schmidt, Robert Kunz, Tim Curwick, Jason A Saslow, SR Foxley, Elliot Beter, Jacob Ash, Christian, Jan Schmid, Jirat, Christy Huddleston, Daniel Baulig, Chris Peters, Anna-Ester Volozh, Ian Dundore, Caleb Weeks


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🐞 Bichikids es un universo lleno de simpáticos bichitos, muy curiosos, alegres y ¡con muchas ganas de divertirse! En cada capítulo los Bichikids se encuentran con nuevas situaciones al igual que nuestros niños. También aprenderán de forma divertida, texturas, aromas, comidas, sonidos, música, baile y valores como la amistad.

This lesson teaches how to subtract 1-digit numbers from twenty with regrouping. Practice free: http://www.ilearn.com/subtract

This playlist teaches how to subtract numbers from two digits through 4 digits. The make a ten strategy covered in the Addition and Subtraction playlist is used in these lessons to teach regrouping. http://www.ilearn.com/subtract

The playlist is organized so that students progress from the simplest cases with the smallest number of digits and no regrouping to the more difficult cases with 4-digit numbers and regrouping in more than one place.

iLearn provides professionally designed math instruction for all markets, including home, K-12, and college. Our instructional programs combine the best scientifically-designed curriculum with state-of-the art delivery systems.

Our specialty is providing easy-to-use, highly effective support, for students who have difficulty learning math. It’s the easiest and fastest way to understand math and master math procedures.

This video is one of over 800 lessons from iLearn on math topics ranging from kindergarten through high school math.

• Subscribe to our channel and have access to all of our lessons here on YouTube.
• Share this video with your friends via your favorite social site.

For free access to unlimited online practice and tests, along with free access to these lessons, go to:

http://www.ilearn.com/subtract

For more information, contact us at:
http://www.ilearn.com
1-877-789-2088 ext. 128 (toll free)

If you prefer to read, rather than watch this video, here’s the transcript:

Title: Learn to subtract 1-digit numbers from twenty with regrouping.

You can already subtract a one-digit number from ten.
In this lesson, you'll learn how to subtract a 1-digit number from 20, which is 2 tens.
Here's an example. 20 minus 3.
Twenty is 2 tens.
We start subtracting in the ones place.
We can't subtract 3 from 0, so we have to take a ten from 20 to make ten ones.
We cross out the 2 in 20 to show we took a ten and we put a 1 here to show we have 1 ten left in the tens place.
We put a 1 here to show that we made ten ones.
Now we subtract 3 from the 10 ones.
10 minus 3 is 7.
In the tens place there's nothing to subtract, so we bring down the 1.
That gives us 17.
So 20 minus 3 is 17.
Another example. 20 minus 8.
Twenty is 2 tens.
We start subtracting in the ones place.
We can't subtract 8 from 0, so we have to take a ten from 20 to make ten ones.
We cross out the 2 in 20 to show we took a ten and we write a 1 above it to show we have one ten left.
We show that we made ten ones by putting a 1 here.
Now we subtract 8 from the 10 ones.
10 minus 8 is 2.
There's nothing to subtract in the tens place, so we bring down the 1 we have left.
That gives us 12.
So 20 minus 8 is 12.
Last example. 20 minus 4.
We start with the ones place.
We can't subtract 4 from 0, so we have to take a ten from 20 to make ten ones.
We cross out the 2 in 20 to show we took a ten.
And we write 1 here to show there is 1 ten left, which is 10.
We put a 1 here to show that we made ten ones.
Now we subtract 4 from 10.
10 minus 4 is 6.
There's nothing to subtract in the tens place, so we bring down the 1 we have left.
That gives us 16.
So 20 minus 4 is 16.
In the rest of this lesson, you'll work problems like these. You can use these boxes if you want, but you don't have to.

http://www.ilearn.com/subtract

https://youtu.be/Y9WhHCgtE5g

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Students explore the effect of chemical erosion on statues and monuments. They use chalk to see what happens when limestone is placed in liquids with different pH values. They also learn several engineering approaches to reduce the effects of acid rain.

View the full activity at TeachEngineering:
https://www.teachengineering.o....rg/activities/view/c

TeachEngineering has over 1,500 FREE lessons and activities. Visit http://www.TeachEngineering.org for more!

Music: Life of Riley - Kevin MacLeod

Life of Riley by Kevin MacLeod is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/)
Source: http://incompetech.com/music/r....oyalty-free/index.ht
Artist: http://incompetech.com/

To further their understanding of sound energy, students identify the different pitches and frequencies created by a vibrating ruler and a straw kazoo. They create high- and low-pitch sound waves.
This engineering curriculum aligns to Next Generation Science Standards (NGSS).

View the full activity on TeachEngineering:
https://www.teachengineering.o....rg/activities/view/c

TeachEngineering has over 1,500 FREE lessons and activities. Visit https://www.teachengineering.org/ for more

Music: Tyler Kimbell

Students learn the history of the waterwheel and common uses for water turbines today. They explore kinetic energy by creating their own experimental waterwheel from a two-liter plastic bottle. They investigate the transformations of energy involved in turning the blades of a hydro-turbine into work, and experiment with how weight affects the rotational rate of the waterwheel. Students also discuss and explore the characteristics of hydroelectric plants.

View the full activity on TeachEngineering: https://www.teachengineering.o....rg/activities/view/c

TeachEngineering has over 1,500 FREE lessons and activities. Visit http://www.TeachEngineering.org for more!

Music: Inevitable

Students build a saltwater circuit, which is an electrical circuit that uses saltwater as part of the circuit. Students investigate the conductivity of saltwater, and develop an understanding of how the amount of salt in a solution impacts how much electrical current flows through the circuit. They learn about one real-world application of a saltwater circuit — as a desalination plant tool to test for the removal of salt from ocean water.

View the full activity at TeachEngineering:
https://www.teachengineering.o....rg/activities/view/c

TeachEngineering has over 1,500 FREE lessons and activities. Visit https://www.teachengineering.org/ for more!

Music: Chopsticks - Jorge Hernandez

Hent materialet her: https://anettekmatematik.com/spring-over-2/

Spring Over er et sjovt lille spil fra min værkstedskasse “Hovedbrud”
Jeg bruger det som et break i undervisningen, som samtidig holder gang i de små grå hos mine elever.
Der går hurtigt sport i at udtænke gode strategier til at løse hele spillepladen, og det er faktisk ikke så let som det ser ud.
Du kan hente spillepladen på min hjemmeside.

God fornøjelse med Spring Over.

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#matematikhjælp #matematikiindskolingen #hovedbrud

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Meet our chess lesson for kids: How Queen Moves and Captures | Chess Lessons | Kids Academy

The strongest piece of chess is the queen. She is the strongest soldier in the team. Let’s see how queen moves and captures and find an easy way to learn chess.

How does it move?
A queen can move like a rook as well as a bishop which means that it can move the maximum number of squares on the board. It can move on diagonals, ranks, and files. It can move a total of 27 squares which means it can attack 27 squares in all directions.
If it moves sideways it means that it moved like a rook. If it moves on a diagonal, then it’s a bishop move.

How does it attack?
The queen can have multiple paths to reach to its enemy. It can either use the rook moves or the bishop moves to capture the enemy. It can either move on the ranks and reach to its target or it can move diagonally and capture the target.

These multiple movements make the queen the strongest pieces on the chess board, as much as the king. It is the strongest defender of the king and can save the king from many difficult situations. Since it can take such great leaps on the chess, its attack may come as a surprise to the opponent who did not pay much attention to where the queen was. So, beware of the queen.


Chess for Kids - Kids Academy

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MORE ABOUT EARTH https://www.youtube.com/playli....st?list=PLLF_mZmNqOn

🌍✨ Did you know our planet is made up of different layers and mostly covered by water? In this educational video for children, you’ll learn how Earth is formed, what its main parts are, and why it’s so special in the Solar System.

Geography in Primary Education allows children to understand the world around them, learning about landscapes, climates, continents, oceans, and the relationship between nature and human societies.

Through our educational videos, they will explore landforms, rivers, countries, capitals, and ecosystems, discovering how humans interact with their environment. At Happy Learning, we make geography fun and accessible, sparking children’s curiosity to explore and discover the planet. 🌍✨

📖 SUBJECT PLAYLISTS
🦖⛰️🐅 NATURAL SCIENCES for Primary School: https://www.youtube.com/playli....st?list=PLLF_mZmNqOn
👨‍🏫 SOCIAL SCIENCES for Primary School: https://www.youtube.com/playli....st?list=PLLF_mZmNqOn
➕✖️ MATH for Primary School Children: https://www.youtube.com/playli....st?list=PLLF_mZmNqOn
🤴🏰 HISTORY for Primary School Children: https://www.youtube.com/playli....st?list=PLLF_mZmNqOn
🌍⛰️ GEOGRAPHY for Primary School Children: https://www.youtube.com/playli....st?list=PLLF_mZmNqOn
🤝😊 Values and Emotions for Primary School Children: https://www.youtube.com/playli....st?list=PLLF_mZmNqOn v=KkCIIQyevjo&list=PL_Y3qbepMRoY7gwuwniiq11oMo6Ofe724

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Happy Learning is a social enterprise created by the Nemesio Diez Foundation, working to improve people's quality of life through education, health, sports and culture.

As a social company, our mission is to educate all children in the world in values and knowledge, to promote their holistic development and their commitment to society and the planet.

We offer educational resources to families, schools, hospitals and NGOs to ensure that children everywhere have access to a high-quality, comprehensive education.

At Happy Learning, we turn learning into an exciting adventure for primary school children. 🚀
We offer over 2,000 educational resources that combine fun and learning through animated videos, reading materials, interactive games and real-world activities.

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Welcome to Happy Learning! 🚀📚
The educational channel where learning is an adventure. Our goal is to spark curiosity and a love for knowledge in primary school children through fun and dynamic educational videos.

Discover the fascinating world of science with videos on Dinosaurs, the Solar System, Invertebrate Animals, Arachnids and much more. Travel back in time with history videos covering Prehistory, the Discovery of America or Ancient Egypt. Learn geography with content about The Earth and Its Movements, the Water Cycle and Parts of the Earth. Strengthen math skills with videos on Multiplication, Subtraction and Matter and Its Properties, and improve Spanish language understanding with lessons on Nouns, Sentences and Subject and Predicate.

Happy Learning transforms education into an exciting experience through animated videos, clear explanations and interactive activities. Perfect for children, parents and teachers seeking high-quality educational content.
🌟 Join our community of explorers!

Discover hundreds of never-before-seen resources! Create your free account at https://my.happylearning.tv/ and start learning in the most entertaining way.

What are you waiting for? Today we are going to learn four times table.

Visit www.happylearning.tv

AMAZING CURIOSITIES ABOUT FISHES | Happy Learning 🐟🐡🐠

Hello, little marine explorers! 🐠🌊 At Happy Learning, we dive into the fascinating world of fish 🐟 to uncover curious and amazing facts about these ocean inhabitants. Did you know that some fish can change color or that there are species that can "breathe" outside of water? 😲💦 Join us on this exciting underwater adventure as we explore the diversity and wonders of the aquatic world. 🌏💙 Get ready to dive into an ocean of knowledge and fun! 🚀🐬 #HappyLearning #ExploringTheSea #FishCuriosities 🌈🐙

Discover hundreds of never-before-seen resources! Create your free account at https://my.happylearning.tv/ and start learning in the most entertaining way.

#fishing
#happylearning
#fish
#shark
#sea

THE FINAL SHOWDOWN! This is the last episode on the immune system and also the very last episode of Crash Course Anatomy & Physiology. In it, Hank explains how the cellular immune response uses helper, cytotoxic, and regulatory T cells to attack body cells compromised by pathogens. He also explores how cytokines activate B and T cells, and what happens if your immune system goes rogue and starts causing autoimmune trouble.

Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App!

Download it here for Apple Devices: https://apple.co/3d4eyZo
Download it here for Android Devices: https://bit.ly/2SrDulJ

***

Chapters:
Introduction: Cells Fight Cells 00:00
Professional Antigen Presenting Cells 1:46
Helper T Cells 4:00
Cytotoxic T Cells 5:23
Immunodeficiencies 6:08
Autoimmune Disorders 7:27
Review 8:26

***

Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse

Thanks to the following Patrons for their generous monthly contributions that help keep Crash Course free for everyone forever:

Mark, Eric Kitchen, Jessica Wode, Jeffrey Thompson, Steve Marshall, Moritz Schmidt, Robert Kunz, Tim Curwick, Jason A Saslow, SR Foxley, Elliot Beter, Jacob Ash, Christian, Jan Schmid, Jirat, Christy Huddleston, Daniel Baulig, Chris Peters, Anna-Ester Volozh, Ian Dundore, Caleb Weeks

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VOCABULARY TIME AND YEAR | Educational Videos for Children: Days of the week, months, seasons...whats on my school bag?

Welcome to Happy Learning, where learning is always fun and exciting! In this charming educational video, we're diving into the fascinating world of the days of the week and the calendar.

Are you ready for an exciting learning journey? Then join us as we explore the calendar and discover the names of the days of the week in this thrilling video for kids! 🚀📚

Through colorful graphics and captivating animations, we'll learn the order of the days of the week, from Monday to Sunday. We'll also discover the importance of each day and how they relate to our daily routines and activities.

Additionally, we'll explore how a calendar is organized and how we can use it to plan our activities and important events. From birthdays to holidays, we'll learn to use the calendar in a fun and educational way! 🎈✨

Don't miss out on this exciting learning adventure with Happy Learning! Subscribe for more thrilling educational videos and join us as we explore the wonderful world of knowledge together! 🌟👩‍🏫👨‍🎓

Discover hundreds of never-before-seen resources! Create your free account at https://my.happylearning.tv/ and start learning in the most entertaining way.

#englishforkids #daysoftheweek #seasons #learning

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Learn to identify the sounds of farm animals in this fun educational video. Listen to how the cow moos, how the rooster crows, or how the pig grunts. Perfect for young children and early education. Become an animal expert! 🐓🐴

Curiosities for kids:https://www.youtube.com/playli....st?list=PLLF_mZmNqOn


Discover hundreds of never-before-seen resources! Create your free account at https://my.happylearning.tv/ and start learning in the most entertaining way.

¡Hoy es el gran día!

La experiencia del aprendizaje de un nuevo idioma no está del todo completa hasta que asistes a una boda local.

Hoy vamos a aprender español a través de la boda de nuestros famosos personajes Sergio y Andrea.

En españa y la mayoría de países hispano hablantes, las bodas son unas de las tradiciones más arraigadas y queridas. Son un motivo de festejo y felicidad.

Vamos a aprender un montón de vocabulario sobre bodas, expresiones típicas que se utilizan durante la ceremonia y todo lo que rodea a esta tradición española.


Las bodas españolas se componen en resumen de:

La petición de matrimonio: https://youtu.be/Q2WKknh_MIU

Los preparativos de la boda: https://youtu.be/pJ7W6k4eSMk

La ceremonia y festejo: Este video

Capítulos:

00:00 El sermón del cura
05:27 La unión
05:40 El beso ❤️
06:26 el festejo
08:00 la comida
08:39 la tarta
09:09 el baile nupcial



Lo habitual es que luego de la ceremonia se realice un festejo, que suele incluir una comida.

Como curiosidad os contamos que los invitados al banquete habitualmente realizan un aporte económico a los novios en forma de "regalo". Se acostumbra regalar al menos un aproximado del coste por persona en el festejo.

¿Cómo son las bodas en tu país?


¡Vivan los novios!



/ Clase 150

. 🔔

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More related videos: https://www.youtube.com/playli....st?list=PLLF_mZmNqOn

Curiosities for kids: https://www.youtube.com/playli....st?list=PLLF_mZmNqOn

Do you know what cardinal and ordinal numbers are? Discover it in this fun educational video! Learn how we use cardinal numbers for counting and performing basic math operations like addition, subtraction, multiplication, and division. You'll also explore ordinal numbers, perfect for ordering and assigning positions within a group. See practical examples like balloon races, counting at a party, and much more. 🌟 Ideal for learning while playing and understanding the magic of numbers.

Discover hundreds of never-before-seen resources! Create your free account at https://my.happylearning.tv/ and start learning in the most entertaining way.

NEW VIDEOS https://www.youtube.com/playli....st?list=PLLF_mZmNqOn
HUMAN BODY https://www.youtube.com/playli....st?list=PLLF_mZmNqOn

0:00 - Introduction
0:14 - Fun Facts About the Human Body
2:56 - Fun Facts About the Brain
5:19 - Fun Facts About the Skeleton
8:49 - Fun Facts About the Eyes
11:30 - The Respiratory System and Breathing
16:47 - The Vital Functions

🧠💪 Did you know that your heart beats over 100,000 times a day or that your skin is the largest organ in your body? In this educational video for primary school kids, you'll discover amazing facts about the human body—from how organs work to fun curiosities about the senses, bones, and brain. 🦴👁️

Natural Sciences in Primary School aim to help children understand the world around them by developing their curiosity and critical thinking through observation and experimentation. They learn about nature, living beings, the human body, energy, and the environment, while also understanding the importance of caring for the planet.

📖 SUBJECT PLAYLISTS
🦖⛰️🐅 NATURAL SCIENCES for Primary School: https://www.youtube.com/playli....st?list=PLLF_mZmNqOn
👨‍🏫 SOCIAL SCIENCES for Primary School: https://www.youtube.com/playli....st?list=PLLF_mZmNqOn
➕✖️ MATH for Primary School Children: https://www.youtube.com/playli....st?list=PLLF_mZmNqOn
🤴🏰 HISTORY for Primary School Children: https://www.youtube.com/playli....st?list=PLLF_mZmNqOn
🌍⛰️ GEOGRAPHY for Primary School Children: https://www.youtube.com/playli....st?list=PLLF_mZmNqOn
🤝😊 Values and Emotions for Primary School Children: https://www.youtube.com/playli....st?list=PLLF_mZmNqOn v=KkCIIQyevjo&list=PL_Y3qbepMRoY7gwuwniiq11oMo6Ofe724

🌍 THE HAPPY LEARNING UNIVERSE

✅ Learn more about Happy Learning and our educational platform: https://happylearning.tv/en/

✅ Discover our social mission: https://happylearning.tv/en/nemesio-diez-foundation/

✅ Download the Happy Learning App:
- iOS: https://apps.apple.com/es/app/....happy-learning-tv/id
- Android: https://play.google.com/store/apps/details?id=tv.happylearning.canal&pli=1

🎓 ABOUT HAPPY LEARNING
Happy Learning is a social enterprise created by the Nemesio Diez Foundation, working to improve people's quality of life through education, health, sports and culture.

As a social company, our mission is to educate all children in the world in values and knowledge, to promote their holistic development and their commitment to society and the planet.

We offer educational resources to families, schools, hospitals and NGOs to ensure that children everywhere have access to a high-quality, comprehensive education.

At Happy Learning, we turn learning into an exciting adventure for primary school children. 🚀
We offer over 2,000 educational resources that combine fun and learning through animated videos, reading materials, interactive games and real-world activities.

📺 HAPPY LEARNING YOUTUBE CHANNEL

Welcome to Happy Learning! 🚀📚
The educational channel where learning is an adventure. Our goal is to spark curiosity and a love for knowledge in primary school children through fun and dynamic educational videos.

Discover the fascinating world of science with videos on Dinosaurs, the Solar System, Invertebrate Animals, Arachnids and much more. Travel back in time with history videos covering Prehistory, the Discovery of America or Ancient Egypt. Learn geography with content about The Earth and Its Movements, the Water Cycle and Parts of the Earth. Strengthen math skills with videos on Multiplication, Subtraction and Matter and Its Properties, and improve Spanish language understanding with lessons on Nouns, Sentences and Subject and Predicate.

Happy Learning transforms education into an exciting experience through animated videos, clear explanations and interactive activities. Perfect for children, parents and teachers seeking high-quality educational content.
🌟 Join our community of explorers!

We talk a lot about Keynesian economics on this show, pretty much because the real world currently runs on Keynesian principles. That said, there are some other economic ideas out there, and today we're going to talk about a few of them. So, if you've been aching to hear about socialism, communism, the Chicago School, or the Austrian School, this episode is for you.

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