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Do you remember having a cold in 5th grade? Or the flu a couple years ago? Your immune system does. Our bodies hold many levels of immune defense.Physical barriers like skin, the innate immune system, and our body’s most powerful defender, the adaptive immune system. Millions of B cells and T cells and antibodies are constantly on patrol for germs and antigen invaders. As scientists learn more about how this system works and how to engineer it, could we ever actually be immune to everything?

Special thanks to Dr. James Crowe (Vanderbilt University) http://www.crowelab.com/

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It’s Okay To Be Smart is hosted by Joe Hanson, Ph.D.
Director: Joe Nicolosi
Writer: Sarah Keartes
Creative Director: David Schulte
Editor/animator: Karl Boettcher and Derek Borsheim
Producer: Stephanie Noone and Amanda Fox

Produced by PBS Digital Studios
Music via APM
Stock images from Shutterstock http://www.shutterstock.com

Anthropic just released a strict, proctored AI credential. No Claude, no notes, just your knowledge. Learn the 14-day sprint strategy to pass the exam and prove your architectural competence to employers. #Anthropic #AICertification #SoftwareEngineering #TechCareers #MachineLearning #AIJobs

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Students further their understanding of the salmon life cycle and the human structures and actions that aid in the migration of fish around hydroelectric dams by playing an animated PowerPoint game involving a fish that must climb a fish ladder to get over a dam. They first brainstorm their own ideas, and then learn about existing ways engineers have made dams "friendlier" to migrating fish, before being quizzed as part of the game.
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: Campfire Song

In July of 2021, Robert “Robby” Asberry took over as the new superintendent of Hancock County Schools, a small district in Hawesville, Kentucky. Driven by the negative academic effects of the pandemic on students and his own son’s struggles with reading, Asberry made overhauling the district’s literacy instruction one of his first priorities. Here’s what happened next.

TPK Learning is a digital platform designed to help students, parents, and teachers make learning easier and more accessible, anywhere and for everyone. We are using technology the way it should be used - as a valuable tool for positive change.

Like our page on Facebook! www.facebook.com/tpklearning
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請訂閱我們的頻道、點讚、分享，鼓勵我們分享更多有用又有趣的知識。
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📍📍Welcome to watch our videos📍📍
歡迎觀看我們所創作的的其他影片
1）Basic Conversation 會話
https://www.youtube.com/playli....st?list=PLPoPxSDq_eP

2) Grammar 語法
https://www.youtube.com/playli....st?list=PLPoPxSDq_eP

3）English Speaking
https://www.youtube.com/playli....st?list=PLPoPxSDq_eP

4）Funny Jokes 笑話
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5）Vocabulary 詞彙
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6）English Idioms 英語成語
https://www.youtube.com/playli....st?list=PLPoPxSDq_eP

7）Revision Exercise 重温練習
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8）Fun Games 趣遊戲味
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9） Tongue Twister 繞口令
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10）Writing a composition 作文
https://www.youtube.com/playli....st?list=PLPoPxSDq_eP

In economics, the idea of marginal cost can be nicely captured with the derivative. Created by Sal Khan.

Watch the next lesson: https://www.khanacademy.org/math/ap-calculus-ab/ab-applications-derivatives/ab-related-rates-intro/v/rates-of-change-between-radius-and-area-of-circle?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/modeling-a-forgetting-curve?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

How do we use adjectives. Irregular adjectives and comparative and superlative.

This video will explain how to distinguish between proper and improper fractions. Thank you for subscribing. 😊

Social studies for 4th grade! 4th Graders will love these social studies videos as we share about government, the White House, the Statue of Liberty, goods and services and other key concepts in this compilation!

00:00 The purpose of government
6:32 The White House
11:04 Statue of Liberty
16:55 Producers and consumers
22:53 Mount Rushmore
27:40 Goods and services
32:50 Urban, suburban and rural areas


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Thanks for learning with us today! We hope to see you next video!

Homeschool Pop Team



Social Studies for 4th Grade Compilation

Educational video for children to improve their memory with a fun 10-level game where they have to remember the position of the picture they're asked to. They will be given 10 seconds to memorize the number behind which the picture is hidden. Very useful resource for elementary school and preschool education.

Thanks for visiting us! If you want your children to smile and learn, subscribe! :D

We only upload our own content, designed by educators so that children smile and learn while watching a video.

All of our content reinforces educational values, encouraging the use of multiple intelligences and language learning.

If you like our videos, download Smile and Learn now. You’ll discover more than 5.000 activities for children aged 3 to 12 yeards, all designed by educators. We have 250 games and interactive stories and over 280 videos in five languages: English, Spanish, Portuguese, Italian and French. Try a month for free and start the adventure!

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FREE Math Videos for Toddlers
http://vismuene.com/6b7a

Buy your own multi-purpose learning module https://invol.co/cl18o24
Buy Rosary here https://invol.co/cl18kr6
Click this link to buy bible https://invol.co/cl14yim Objective: Find the Greatest Common Factor (GCF) of sets of numbers
This video is compatible with Interactive Whiteboard
Download my Math Interactive Whiteboard Lessons and flash games here: http://iwb-resources.blogspot.com

This SAT math video explains how to solve rational equations in addition to factoring trinomials.

SAT Math Part 4: https://www.youtube.com/watch?v=Oiq7FE0cjUk

SAT Chemistry Part 1:
https://www.youtube.com/watch?v=N-clMX2poLY

_______________________________________
How To Factor Trinomials:
https://www.youtube.com/watch?v=-4jANGlJRSY

The Greatest Common Factor:
https://www.youtube.com/watch?v=ynefQgfxZBs

Difference of Squares & Sum of Cubes:
https://www.youtube.com/watch?v=Rqu9KwjtVpI

Factoring Perfect Square Trinomials:
https://www.youtube.com/watch?v=f6yhfmW41wI

How To Factor By Grouping:
https://www.youtube.com/watch?v=t7-JCa7phCQ

Cubic Polynomials:
https://www.youtube.com/watch?v=rnAKWPM-YBc

_______________________________________
Solving Quadratic Equations By Factoring:
https://www.youtube.com/watch?v=qeByhTF8WEw

Quadratic Equations Completing The Square:
https://www.youtube.com/watch?v=yk-3ZRG0YAU

How To Factor Difficult Quadratic Equations:
https://www.youtube.com/watch?v=VG1luiL_INQ

Hard Factoring Examples:
https://www.youtube.com/watch?v=9MUDAr1PnlE

Factor Completely - Multiple Variables:
https://www.youtube.com/watch?v=2x657vOBkXY

Factoring Higher Degree Polynomials:
https://www.youtube.com/watch?v=HKDdzBuffoY

_______________________________________
Factoring Trinomials With Large Numbers:
https://www.youtube.com/watch?v=zw7nUKHc4n0

Factor Trinomials With Negative Exponents:
https://www.youtube.com/watch?v=dOuI8pvevcw

Factoring - Rational Exponents:
https://www.youtube.com/watch?v=BpS6mO4V2wc

Factor Theorem and Synthetic Division:
https://www.youtube.com/watch?v=zAGP46nR6-0

Finding All The Zeros of a Polynomial:
https://www.youtube.com/watch?v=Iaq7z7reznM

Real and Imaginary Solutions:
https://www.youtube.com/watch?v=tRrPfxR5h-w

_________________________________________
Final Exams and Video Playlists:
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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/differential-equa

Introduction to separable differential equations.

Watch the next lesson: https://www.khanacademy.org/ma....th/differential-equa-2?utm_source=YT&utm_medium=Desc&utm_campaign=DifferentialEquations

Missed the previous lesson?
https://www.khanacademy.org/math/differential-equations/first-order-differential-equations/separable-equations/v/particular-solution-to-differential-equation-example?utm_source=YT&utm_medium=Desc&utm_campaign=DifferentialEquations

Differential Equations on Khan Academy: Differential equations, separable equations, exact equations, integrating factors, homogeneous equations.

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 Differential Equations channel:: https://www.youtube.com/channe....l/UCxSQHGkaDv8UKXE0T
Subscribe to KhanAcademy: https://www.youtube.com/subscr....iption_center?add_us

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

Proving that a = v^2/r. Created by Sal Khan.

Watch the next lesson: https://www.khanacademy.org/science/physics/centripetal-force-and-gravitation/centripetal-acceleration-tutoria/v/loop-de-loop-question?utm_source=YT&utm_medium=Desc&utm_campaign=physics

Missed the previous lesson? https://www.khanacademy.org/science/physics/centripetal-force-and-gravitation/centripetal-acceleration-tutoria/v/jrhildebrand-turning?utm_source=YT&utm_medium=Desc&utm_campaign=physics

Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of trigonometry.

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 Physics channel: https://www.youtube.com/channe....l/UC0oGarQW2lE5PxhGo
Subscribe to Khan Academy: https://www.youtube.com/subscr....iption_center?add_us

In Basic Statistics for Kids, you and your students will learn about data sets, mean, median, mode, range and more. All this information will help kids get their feet wet and understand what statistics is all about! It is important to learn about statistics at an early age. Statistics help businesses and individuals make important decisions throughout life.

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 Math lesson plans:
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English Grammar Course FULL Quiz (250 Questions): https://shawenglish.com/quizze....s/full-basic-english

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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.
0:00 - Beginner English Introduction
0:57 - Vowels and Consonants
5:57 - a/an + Noun
11:26 - Singular / Plural Nouns
20:45 - Subjective Pronouns
26:53 - Subjective Pronouns + Be
33:44 - Subjective Pronouns + Be + Not 38:43 - 'be' Verb Pronoun Questions
49:54 - Review #1 - Subjective Pronouns 53:12 - Grammar Check Up #1
58:55 - What + Be Verb Questions
1:03:43 - This / That
1:07:32 - These / Those
1:11:58 - This / That / These / Those Practice
1:13:47 - Possessive Adjectives
1:21:46 - Possessive Pronouns
1:27:04 - Grammar Check Up #2
1:34:16 - Articles + Noun
1:40:47 - Prepositions: in / on / under 1:45:44 - Beginner Adjectives
1:50:13 - Grammar Check Up #3
1:57:41 - Have / Has
2:01:59 - Don't / Doesn't Have Questions 2:06:26 - Do / Does Have Questions
2:10:42 - Grammar Check Up #4
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Every evening near Vancouver BC, a huge gathering of crows descend on a single block at Still Creek Drive, Burnaby. It is crazy!

I honestly don’t know how I should be educating my kids. A.I. has raised a lot of questions for schools. Teachers have had to adapt to the most ingenious cheating technology ever devised. But for me, the deeper question is: What should schools be teaching at all? A.I. is going to make the future look very different. How do you prepare kids for a world you can’t predict?

And if we can offload more and more tasks to generative A.I., what’s left for the human mind to do?

Rebecca Winthrop is the director of the Center for Universal Education at the Brookings Institution. She is also an author, with Jenny Anderson, of “The Disengaged Teen: Helping Kids Learn Better, Feel Better, and Live Better.” We discuss how A.I. is transforming what it means to work and be educated, and how our use of A.I. could revive — or undermine — American schools.

0:00 Intro
3:03 The future of education?
11:20 Modes of engagement
17:27 Personalizing education
26:25 The case for A.I. in schools
35:09 Who gets left behind?
46:07 How A.I. can increase equity
49:35 Becoming more human
55:54 Willpower, literacy, and regulation
01:01:10 Advice for parents
01:05:20 Book recommendations

Read the full transcript here: https://www.nytimes.com/2025/0....5/13/opinion/ezra-kl

Watch more on @EzraKleinShow

Thoughts? Guest suggestions? Email us at ezrakleinshow@nytimes.com.

You can find transcripts (posted midday) and more episodes of “The Ezra Klein Show” at nytimes.com/ezra-klein-podcast. Book recommendations from all our guests are listed at https://www.nytimes.com/articl....e/ezra-klein-show-bo

I got the chance to interview Bill Gates so I asked him: Will Covid-19 be the last pandemic? How does he deal with misinformation and conspiracy theories? And what is the next disaster? The Foundation Letter is here: https://ve42.co/BG21

Special thanks to Patreon supporters:
Ludovic Robillard, jim buckmaster, Robert, fanime96, Marc Forand, Juan Benet, Robert Blum, Grace O'Maille KRON x Arc iOS, Richard Sundvall, Lee Redden, Vincent, Lyvann Ferrusca, Alfred Wallace, Arjun Chakroborty, Joar Wandborg, Clayton Greenwell, Pindex , Michael Krugman, Cy 'kkm' K'Nelson, Sam Lutfi, Ron Neal

Thanks to Petr Lebedev for the thumbnail, early edits and Jonny Hyman for feedback