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

What's the relationship between how fast a circle's radius changes, and how fast its area changes? Created by Sal Khan.

Watch the next lesson: https://www.khanacademy.org/math/ap-calculus-ab/ab-applications-derivatives/ab-related-rates-intro/v/analyzing-related-rates-problems-expressions?utm_source=YT&utm_medium=Desc&utm_campaign=APCalculusAB

Missed the previous lesson? https://www.khanacademy.org/math/ap-calculus-ab/ab-applications-derivatives/ab-applied-rate-of-change/v/derivative-and-marginal-cost?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

Subscribe to Khan AcademyÕs AP Calculus AB channel: https://www.youtube.com/channe....l/UCyoj0ZF4uw8VTFbml
Subscribe to Khan Academy: https://www.youtube.com/subscr....iption_center?add_us

¡Aprende español práctico con situaciones reales! 🌟 En este video, seguimos dos diálogos esenciales para la vida diaria: hacer operaciones bancarias y hacer la compra en el supermercado. Perfecto para estudiantes de todos los niveles que quieran sonar más naturales en español.

🏦 Escena 1: En el Banco

Vocabulario clave:

Operaciones bancarias: ingresar dinero, saldo, tarjeta bancaria, DNI

Frases útiles:

"Quisiera ingresar dinero en mi cuenta"

"Introduce tu PIN"

"¿Podrías mostrarme el saldo?"

📌 Aprenderás:

Cómo realizar transacciones básicas en un banco.

Expresiones formales para tratar con empleados bancarios.

🛒 Escena 2: En el Supermercado

Vocabulario clave:

Productos: tomates, cebollas, brócoli, mozzarella, cheddar

Frases útiles:

"¿Has traído la lista de la compra?"

"Están en oferta"

"Ten cuidado, los huevos se rompen fácilmente"

📌 Aprenderás:

Cómo preguntar por productos y comparar precios.

Expresiones cotidianas entre familiares.

💡 ¡Practica con Estas Preguntas!

¿Cómo pedirías ingresar dinero en tu cuenta bancaria?
¿Qué dirías si ves un producto en oferta en el supermercado?
¿Cómo recomendarías un queso a un amigo?

🌟 ¿Qué otra situación cotidiana te gustaría ver en un diálogo? ¡Cuéntanos en los comentarios! 👇

🔔 Suscríbete para más conversaciones reales. ¡Nuevo video cada semana! 🚀

📚 Bonus: Si quieres más vocabulario, mira nuestro video "Diálogos Cotidianos | Parte 1" : https://youtu.be/jTlJIpoD9i0

Two years ago, a magnet high school for students pursuing careers in education opened in San Antonio.

Here, 10th graders at CAST Teach describe the qualities that make a good teacher, what inspired them to pursue careers in education, and their fears for the future.

Subscribe to Happy Learning: https://my.happylearning.tv/

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

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

Did you know that matter can change from solid to liquid or from gas to liquid? 🌡️✨ In this educational video from Happy Learning, you'll learn about the states of matter (solid, liquid, and gaseous) and how they change through heating or cooling. Discover the processes of fusion, solidification, vaporization, and condensation in a simple and fun way. Don’t forget to subscribe to keep exploring the world of science with us! 🚀👩‍🔬

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

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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 a machine is? Machines help us complete tasks more easily and with less effort. In this educational video from Happy Learning, you'll learn about:

Simple machines: like the wheel, lever, and inclined plane
Compound machines: like bicycles, washing machines, and tractors
Discover how these tools work and how they have changed the way we work and live. Don't miss it.

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

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

#fractions #decimals #math #mathtips #homeschoolmath

In this video, I show you how easy it is to turn a single-digit repeating decimal into a fraction. All you have to do is put the number in your decimal over 9!


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🔴 Share this video with a friend: https://youtu.be/fJZF6qxucC8

🔴 Check out this playlist:

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Improved math is a channel created to provide additional instruction on essential math concepts. I’m passionate about math and I know first-hand how important math concepts are in the real world.

Teachers, parents, guardians, homeschoolers, and students can use these videos to help reinforce math skills. These math videos are designed to help teach yourself math or provide self-study math tools to assist when additional instruction is needed. Teaching math and learning math has changed the way many students learn in this virtual environment. Having on-demand math videos can provide math tutoring needed when children are not able to get help from their teachers after school hours or when trying to do math at home.

The library of math tutorials that I create can also be used as supplemental instructional material for homeschool math. Each full-length video comes with a subsequent knowledge check or math practice problems which serve as a virtual math topic worksheet to test your understanding of each skill. These videos can be paused to work out the problems on your own, then unpaused to check your answers. All of these videos can be found under the Knowledge Check playlist.

I also have a library of shorter videos (less than 1 minute in length - shorts) that are quick math tips and tricks on basic math topics. Some of these short math help videos include problems that you can work on yourself and submit your answers in the comments. They are all listed under my Math Tips and Tricks playlist.

Improved math is creating more videos every day to cover topics from 4th grade, 5th grade, 6th grade, and 7th-grade math. The videos focus on fractions, basic math operations, geometry, and ratios but more topics are being added all the time. If there is a specific topic you would like to see covered, drop me a comment in one of my videos and let me know!

Free math help videos will be posted every Thursday and Friday. For additional math resources, check out my math help website at improvedmath.com where I post math worksheets and answers along with additional context on math basics.



Thanks for watching my channel.

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You’ve probably heard of Ben Franklin and the kite. But do you know the TRUE story of how his famous experiment changed the world? Here’s the tale of how one person’s quest for scientific knowledge altered the direction of history.

References:

Dray, Philip. “Stealing God's Thunder: Benjamin Franklin's Lightning Rod and the Invention of America.” Random House, 2005.

Franklin, Benjamin. “Experiments and observations on electricity, made at Philadelphia in America” 1769. https://archive.org/details/ex....perimentsobser00fran

-----------
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Neil deGrasse Tyson features his interview with Jane Goodall and discusses chimpanzee behavior with Chuck Nice and Jill Pruetz.

Jane Goodall 1934 - 2025

Startalk | S3, E3

Explore the World with National Geographic subscriptions: https://natgeo.com/ytngmagazine

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#NationalGeographic #Startalk #JaneGoodall

About National Geographic:
National Geographic is the world's premium destination for critically acclaimed storytelling around science and exploration. Discover amazing wildlife, ancient civilizations, hidden worlds, and the incredible wonders of our Earth. Through world-class scientists, photographers, journalists, and filmmakers, Nat Geo inspires fans of all ages to connect with, explore, and care about the world.

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Jane Goodall: Discussing Chimpanzee Behavior (Full Episode) | Startalk | National Geographic
https://youtu.be/Ztjcf7iR5DE

National Geographic
youtube.com/natgeo

What happens when a super long slinky is dropped?

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/sc....ience/ap-biology/cel

Mitosis is how cells divide! Learn what happens in all the phases of mitosis: prophase, metaphase, anaphase, and telophase.

Watch the next lesson: https://www.khanacademy.org/test-prep/mcat/cells/cellular-division/v/comparing-mitosis-and-meiosis?utm_source=YT&utm_medium=Desc&utm_campaign=mcat

Missed the previous lesson? https://www.khanacademy.org/test-prep/mcat/cells/cellular-division/v/interphase?utm_source=YT&utm_medium=Desc&utm_campaign=mcat

MCAT on Khan Academy: Go ahead and practice some passage-based questions!

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 MCAT channel: https://www.youtube.com/channe....l/UCDkK5wqSuwDlJ3_nl
Subscribe to Khan Academy: https://www.youtube.com/subscr....iption_center?add_us

Here, I show a couple more examples of how to solve single variable inequalities.

Join this channel to get access to perks:
https://www.youtube.com/channe....l/UCn2SbZWi4yTkmPUj5

:)

"How to use a redox reaction to construct a galvanic/voltaic cell to produce a flow of current.. Shows the flow of electrons and ions, and explains the role of the salt bridge.

Watch the next lesson: https://www.khanacademy.org/science/chemistry/oxidation-reduction/batter-galvanic-voltaic-cell/v/electrodes-and-voltage-of-galvanic-cell?utm_source=YT&utm_medium=Desc&utm_campaign=chemistry

Missed the previous lesson? https://www.khanacademy.org/science/chemistry/oxidation-reduction/batter-galvanic-voltaic-cell/v/redox-reaction-from-dissolving-zinc-in-copper-sulfate?utm_source=YT&utm_medium=Desc&utm_campaign=chemistry

Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.

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 Chemistry channel: https://www.youtube.com/channe....l/UCyEot66LrwWFEMONv
Subscribe to Khan Academy: https://www.youtube.com/subscr....iption_center?add_us

Students come to understand the basics of engineering associated with the use, selection, and properties of fabrics. A wide variety of natural and synthetic fibers are used in our clothing, home furnishings and in our travel and sports equipment. The specific material chosen for each application depends on how closely the properties of the material match the design needs. This activity focuses on the different characteristics of fabrics and shows students how natural and synthetic fabrics differ from one another. Students weigh the advantages and disadvantages of fabrics when considering the appropriate fabric to be used.

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 - Brightly Fancy Oddities

More: http://math247.pbworks.com/GeoGebra-for-Beginners A first lesson for getting started with GeoGebra for the person who has never used dynamic mathematics software. See also: http://math247.pbworks.com/Learn+and+Use+GeoGebra

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

Much of statistics is based upon using data from a random sample that is representative of the population at large. From that sample mean, we can infer things about the greater population mean. We'll explain.

Watch the next lesson: https://www.khanacademy.org/math/probability/descriptive-statistics/box-and-whisker-plots/v/reading-box-and-whisker-plots?utm_source=YT&utm_medium=Desc&utm_campaign=ProbabilityandStatistics

Missed the previous lesson?
https://www.khanacademy.org/math/probability/descriptive-statistics/central_tendency/v/comparing-means-and-medians?utm_source=YT&utm_medium=Desc&utm_campaign=ProbabilityandStatistics

Probability and statistics on Khan Academy: We dare you to go through a day in which you never consider or use probability. Did you check the weather forecast? Busted! Did you decide to go through the drive through lane vs walk in? Busted again! We are constantly creating hypotheses, making predictions, testing, and analyzing. Our lives are full of probabilities! Statistics is related to probability because much of the data we use when determining probable outcomes comes from our understanding of statistics. In these tutorials, we will cover a range of topics, some which include: independent events, dependent probability, combinatorics, hypothesis testing, descriptive statistics, random variables, probability distributions, regression, and inferential statistics. So buckle up and hop on for a wild ride. We bet you're going to be challenged AND love it!

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 KhanAcademy’s Probability and Statistics channel:
https://www.youtube.com/channe....l/UCRXuOXLW3LcQLWvxb
Subscribe to KhanAcademy: https://www.youtube.com/subscr....iption_center?add_us

🚀 Become an AI Master – All-in-one AI Learning https://aimaster.me/pro

In this video I give you the ultimate crash-course for ChatGPT in 92 seconds! Become a ChatGPT Pro in over a minute! All you need to know about prompting, image generation, coding, data analysis, and much more!

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

Basic algorithm for Synthetic Division

Watch the next lesson: https://www.khanacademy.org/math/algebra2/polynomial_and_rational/synthetic-division/v/synthetic-division-example-2?utm_source=YT&utm_medium=Desc&utm_campaign=AlgebraII

Missed the previous lesson?
https://www.khanacademy.org/math/algebra2/polynomial_and_rational/dividing_polynomials/v/dividing-polynomials-with-remainders-example?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!

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 II channel:
https://www.youtube.com/channe....l/UCsCA3_VozRtgUT7wW
Subscribe to Khan Academy: https://www.youtube.com/subscr....iption_center?add_us

Support the Simple History channel and play War Thunder now for FREE and also get a free Premium tank or aircraft and 3 days of Premium time: https://gjn.link/SimpleHistory/190413

PIAT - stood for Projector, Infantry, Anti -Tank weapon and was the main British anti-tank weapon of World War Two.

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Copyright: DO NOT translate and re-upload our content on Youtube or other social media.

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Credit:
Created by Daniel Turner

Narrator:

Christian H. Miles
www.christianhmiles.co.uk


Music Credit:
Action Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0 License
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Sources:

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This organic chemistry video tutorial provides a basic introduction into valence bond theory and hybrid atomic orbitals. It explains how to find the hybridization of carbon atom such as sp, sp2, and sp3. it also explains how to describe the orbitals that overlap to form a covalent bond. In addition, it explains how to determine the number of sigma and pi bonds in a molecule.

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Direct Link to The Full Video:
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Organic Chemistry PDF Worksheets:
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Full 33 Minute Video on YouTube:
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