Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/hu....manities/world-histo

Learn about the outbreak of World War I. Created by Sal Khan.

Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/world-history/euro-hist/world-war-i-tutorial/e/world-war-I-causes?utm_source=YT&utm_medium=Desc&utm_campaign=worldhistory

Watch the next lesson: https://www.khanacademy.org/humanities/world-history/euro-hist/american-entry-world-war-i/v/blockades-u-boats-and-sinking-of-the-lusitania?utm_source=YT&utm_medium=Desc&utm_campaign=worldhistory

Missed the previous lesson? https://www.khanacademy.org/humanities/world-history/euro-hist/world-war-i-tutorial/v/assassination-of-franz-ferdinand-by-gavrilo-princip?utm_source=YT&utm_medium=Desc&utm_campaign=worldhistory


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 World History channel: https://www.youtube.com/channe....l/UC6KRvvmvkCchFMo2E
Subscribe to Khan Academy: https://www.youtube.com/subscr....iption_center?add_us

Welcome to Multiplying Fractions Using Cancellation with Mr. J! Need help with how to multiply fractions? You're in the right place!

Whether you're just starting out, or need a quick refresher, this is the video for you if you're looking for help with multiplying fractions with cross cancellation. Mr. J will go through multiplying fractions with cross canceling examples and explain how to multiply fractions using cancellation.

✅ Improper Fractions to Mixed Numbers:
https://youtu.be/EpXCr2iax5E

✅ Mixed Numbers to Improper Fractions:
https://youtu.be/96NOYcnmThU

✅ Simplifying Fractions:
https://youtu.be/oFVzcnJfYkg

✅ Plus many more... Just search what topic you are looking for + "with Mr. J" (for example, "adding fractions with Mr. J".

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.

Click Here to Subscribe to the Greatest Math Channel On Earth: https://goo.gl/XHTrfY

Follow Mr. J on Twitter: @MrJMath5

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 multiplying fractions using cancellation.

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The law stated that you had to be 18 to sign up and 19 to serve overseas in the British Armed Forces. However thousands of boys and young men under this age requirement managed to volunteer for the army by lying about their age or making up false names.

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Credit:
Created by Daniel Turner

Narrator:

Joe French


Music Credit

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

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

Parametric Representations of Lines in R2 and R3

Watch the next lesson: https://www.khanacademy.org/math/linear-algebra/vectors_and_spaces/linear_combinations/v/linear-combinations-and-span?utm_source=YT&utm_medium=Desc&utm_campaign=LinearAlgebra

Missed the previous lesson?
https://www.khanacademy.org/math/linear-algebra/vectors_and_spaces/vectors/v/intro-unit-vector-notation?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.

For free. For everyone. Forever. #YouCanLearnAnything

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Esther is an American teacher from California.
It is the best video course for beginner students. Esther teaches English articles, pronouns, prepositions, adjectives, etc. This video is perfect to help you improve your English speaking, listening, writing, and reading.
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1:50:13 - Grammar Check Up #3
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Practice this lesson yourself on KhanAcademy.org right now:
https://www.khanacademy.org/math/trigonometry/less-basic-trigonometry/trig-symmetry-periodicity/e/symmetry-and-periodicity-of-trig-functions?utm_source=YT&utm_medium=Desc&utm_campaign=Trigonometry

Watch the next lesson: https://www.khanacademy.org/math/trigonometry/less-basic-trigonometry/trig-symmetry-periodicity/v/tan-symmetries-unit-circle?utm_source=YT&utm_medium=Desc&utm_campaign=Trigonometry

Missed the previous lesson?
https://www.khanacademy.org/math/trigonometry/trig-function-graphs/long_live_tau/v/pi-is-still-wrong?utm_source=YT&utm_medium=Desc&utm_campaign=Trigonometry

Trigonometry on Khan Academy: Big, fancy word, right? Don't be fooled. Looking at the prefix, tri-, you could probably assume that trigonometry ("trig" as it's sometimes called) has something to do with triangles. You would be right! Trig is the study of the properties of triangles. Why is it important? It's used in measuring precise distances, particularly in industries like satellite systems and sciences like astronomy. It's not only space, however. Trig is present in architecture and music, too. Now you may wonder...how is knowing the measurement and properties of triangles relevant to music?? THAT is a great question. Maybe you'll learn the answer from us in these tutorials!

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 Trigonometry channel:
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Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/hu....manities/world-histo

Why is Mesopotamia considered the "cradle of civilization"? Sal explains the history of the early empires on the Tigris and Euphrates rivers.

Practice this yourself on Khan Academy right now: https://www.khanacademy.org/wo....rld-history/e/mesopo

Watch the next lesson: https://www.khanacademy.org/hu....manities/world-histo

World History on Khan Academy: From prehistory to today, this course covers the human events that have shaped our planet.


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: https://www.youtube.com/subscr....iption_center?add_us

The second world war saw many varied weapons being used by soldiers. Let's look at what was manufactured and being used on the battlefield.

Leave a comment below letting us know what weapon you found the most interesting or what weapon you would like to see ina sequel video.

Infantry Weapons of WWI
https://www.youtube.com/watch?v=S0t4afIEw0M

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Credit:

Narrator:

Chris Kane

https://ckvox.com/

https://www.youtube.com/channe....l/UCbFfLQAj_zE6rSo7A


Animation:
Daniel Turner

Artwork:
Daniel turner


Music

The Victory Of The War

No Copyright Free Music
GENERIC MUSIC
CINEMATIC Music

Pictures: Wikimedia Commons (Public Domain)

Sources:

Richard R. Hallock, Colonel (retired) of US Army M16 Case Study 16 March 1970

In todays video we look at Chinas version of o1 and more details on ChatGPT Operator.

Links:
https://chat.deepseek.com/
https://api-docs.deepseek.com/quick_start/pricing/
https://deepmind.google/techno....logies/gemini/flash-
https://www.perplexity.ai/hub/....blog/introducing-the
https://runwayml.com/worlds-of-frames
https://klingai.com/release-notes
https://lumalabs.ai/ray
https://huggingface.co/spaces/tencent/Hunyuan3D-2


Chapters:
0:00 What’s New?
0:31 DeepSeek-R1
3:44 Sam Altman’s Tweet
4:47 ChatGPT Operator & o3-mini
7:54 Gemini 2.0 Flash Thinking Experimental
8:42 Perplexity Sonar
9:40 Runway Frames
12:10 Kling AI Elements
12:48 Luma AI Ray2
13:56 Hunyuan 3D Generator
15:04 Message for Viewers

#ainews #newsyoucanuse

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

Definition of ion and ionization energy, and trends in ionization energy across a period and down a group.

Watch the next lesson: https://www.khanacademy.org/science/chemistry/periodic-table/periodic-table-trends-bonding/v/group-trend-for-ionization-energy?utm_source=YT&utm_medium=Desc&utm_campaign=chemistry

Missed the previous lesson? https://www.khanacademy.org/science/chemistry/periodic-table/periodic-table-trends-bonding/v/mini-video-on-ion-size?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

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

¿Sigues perdiendo horas buscando información en tus propios archivos? La era de la lectura pasiva ha muerto. 💀

En este video, te revelo cómo la integración de Gemini + NotebookLM está redefiniendo la productividad profesional. No se trata solo de chatear con una IA; se trata de construir un Ecosistema de Conocimiento "Grounded" donde tú tienes el control total de las fuentes y la IA actúa como tu socio de pensamiento estratégico.

Como experto en IA, he visto cómo el gran obstáculo para las empresas es la "alucinación" de los modelos. Hoy, te enseño a eliminar ese riesgo integrando tus cuadernos de investigación directamente en el flujo de trabajo de Gemini.

Únete a la conversación en:
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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/ap-calculus-ab/ab

Understanding that the derivative is just the slope of a curve at a point (or the slope of the tangent line)

Practice this yourself on Khan Academy right now: https://www.khanacademy.org/e/skill-check--tangent-lines?utm_source=YTdescription&utm_medium=YTdescription&utm_campaign=YTdescription

Watch the next lesson: https://www.khanacademy.org/math/differential-calculus/taking-derivatives/derivative_intro/v/tangent-slope-as-limiting-value-of-secant-slope-example-1?utm_source=YT&utm_medium=Desc&utm_campaign=DifferentialCalculus

Missed the previous lesson?
https://www.khanacademy.org/math/differential-calculus/taking-derivatives/secant-line-slope-tangent/v/approximating-equation-of-tangent-line-word-problem-1?utm_source=YT&utm_medium=Desc&utm_campaign=DifferentialCalculus

Differential calculus on Khan Academy: Limit introduction, squeeze theorem, and epsilon-delta definition of limits.

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 KhanAcademy’s Differential Calculus channel:
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Thousands of parents and educators are turning to the kids’ learning app that makes real learning truly fun. Try Kids Academy with
3-day FREE TRIAL! https://bit.ly/2GuGyL2

Your Community | Types of Community | Kids Academy

Your Community | Types of Community | Kids Academy
Does your kid know about the community? Do you know how to explain it to them? Well, don’t worry this tutorial will help you explain the concept of community to your kid in simple and easy words.

What is a community?

A community is a place where people live together. They interact with each other and live by knowing each other. It is very important for the kid to understand the importance of living in a community and what is the actual meaning of living in a community.

Types of communities

There are many different types of communities. In this lesson, we will cover the three most common types.

1. Urban
2. Suburban
3. Rural

Urban community

An urban community is large and highly populated. This means that a big number of people live there. Tall buildings, skyscrapers, heavy traffic, and transportation are key identification of an urban community. For example, New York City is an urban community. In urban communities, you will find everyone busy with their tasks, with heavy traffic and a lot of hustle and bustle. That is why New York is called the city that never sleeps.

It remains busy all day and all night. Most people living in apartment buildings while very few live in homes. You will see a lot of apartments and homes packed with each other due to the high population.

Suburban community

A suburban community is located near a city but not as populated as an urban community. There are less traffic and smaller buildings. Some people travel to the nearby urban for work, which is called commuting. Many people live in homes which are very beautifully made. They have amenities such as large backyards and garages.

Rural community

A rural community has very few people and buildings. It mainly consists of farmland. There is more nature in the rural community, you will see animals, trees, grassy lands, and pure water. people live in small houses that are spaced far apart even miles away. It has a very peaceful environment with no honking and people rushing and heavy traffic.

So, this was a small lesson on communities. In which community would you like to live?


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Kids Academy Talented and Gifted Program for kids aged 2-10:

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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/precalculus/x9e81

Practice this lesson yourself on KhanAcademy.org right now:
https://www.khanacademy.org/math/precalculus/precalc-matrices/matrix_multiplication/e/defined_and_undefined_matrix_operations?utm_source=YT&utm_medium=Desc&utm_campaign=Precalculus

Watch the next lesson: https://www.khanacademy.org/math/precalculus/precalc-matrices/matrix_multiplication/v/matrix-multiplication-intro?utm_source=YT&utm_medium=Desc&utm_campaign=Precalculus

Missed the previous lesson?
https://www.khanacademy.org/math/precalculus/precalc-matrices/matrix_multiplication/v/multiplying-a-matrix-by-a-column-vector?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

For the best selling history themed tabletop games head over to warlord games and check out the Naval warfare in the Black Powder series!
http://store.warlordgames.com/?aff=SimpleHistory
This type of projectile was particularly effective against the sails, masts, and rigging of a ship, shredding and tearing them apart.

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Simple history gives you the facts, simple!

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Credit:
Created by Daniel Turner
Script: Conan White


Narrator:
Bryan 'Lazlo' Beauregard

Music Credit:

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



Kings of the Sea: Charles II, James II & the Royal Navy
By J. D. Davies
Ship Decoration, 1630–1780
By Andy Peters
Pepyss Navy: Ships, Men and Warfare, 1649–89
By J. D. Davies

Artillery Through The Ages: A Short Illustrated History Of Cannon, Emphasizing Types Used In America
by Albert C. Manucy

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/hu....manities/us-governme

Federalism in the United States. Exclusive and concurrent federal and state powers.

View more lessons or practice this subject at https://www.khanacademy.org/humanities/ap-us-government-and-politics/foundations-of-american-democracy/relationship-between-states-and-the-federal-government/v/federalism-in-the-united-states?utm_source=youtube&utm_medium=desc&utm_campaign=usgovernmentandcivics

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! Donate or volunteer today!

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The Cold War saw a competition between the world’s two great powers–the democratic, capitalist United States and the communist Soviet Union. Both sides would fight to have the best technology in space and who could achieve the ‘firsts’.

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Get your copy of Simple History: The Space Race today!

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Get your copy of Simple History: The Cold War today!

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Simple history gives you the facts, simple!

See the book collection here:

Amazon USA

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Credits:

Narrator:

Nate Wales 'Call Me Crow'

Call Me Crow Soundcloud

https://soundcloud.com/noahd-3

Animation:
Daniel Turner

Artwork:
Daniel turner


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Pictures: Wikimedia Commons (Public Domain)

This video sample from our English Language Arts 1 course helps students learn to create possessive singular nouns using bright and fun visual examples.

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