Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/ma....th/algebra/x2f8bb115

Practice this lesson yourself on KhanAcademy.org right now:
https://www.khanacademy.org/math/precalculus/seq_induction/seq_and_series/e/arithmetic_sequences_1?utm_source=YT&utm_medium=Desc&utm_campaign=Precalculus

Watch the next lesson: https://www.khanacademy.org/math/precalculus/seq_induction/seq_and_series/v/arithmetic-sequences?utm_source=YT&utm_medium=Desc&utm_campaign=Precalculus

Missed the previous lesson?
https://www.khanacademy.org/math/precalculus/seq_induction/proof_by_induction/v/alternate-proof-to-induction-for-integer-sum?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.

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Copyright: DO NOT translate and re-upload our content on Youtube or other social media.
Although the use of a spy balloon in 2023 was considered startlingly primitive, these lighter-than-a feather sacks caused an entire ‘balloonomania’ when they first began being introduced in eighteenth century France. Pilots risked their lives to prove their creations could be used for flight, with Jean-Pierre Blanchard even throwing away his trousers and jacket to keep his balloon afloat as he and his friend crossed the English Channel airborne. Yet, it wasn’t long before these marvellous spectacles, once wondrous spheres of colour in the sky, would be given additional roles. Ones as innovative tools for destruction, terror and intelligence gathering. Well… occasionally, of course.
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Credit:
Show Created by Daniel Turner (B.A. (Hons) in History, University College London)
Script: Jake Leigh-Howarth
Narrator:
Bryan 'Lazlo' Beauregard

"Balloons in the American Civil War." ACWS, Spring 2010.

Cho, Kelly Kasulis. "Timeline: A suspected Chinese spy balloon’s eight-day journey." WashingtonPost, February 5, 2023.

Czekanski, Tom. "Museum Acquires Item Related to the First African American Unit in Normandy." NationalWW2Museum, February 1, 2020.

Frazier, Kendrick. "The Roswell Incident at 70: Facts, Not Myths." Skeptical Inquirer, Volume 41.6, November/December 2017.

Haydon, Frederick Stansbury. Military Ballooning during the early Civil War. Baltimore: Johns Hopkins University Press, 2000.

Klein, Christopher. "When Japan Launched Killer Balloons in World War II." History. Last modified February 6, 2023.

Leary, William M. "Robert Fultons Skyhook and Operation Coldfeet." CIA.

"Military Use of Balloons in the Mid- and Late Nineteenth Century." US Centennial Flight Commission.

Schwarz, Jon. "U.S. Sent “Weather” Balloons to Spy on China and the Soviet Union in the 1950s." The Intercept, February 7 2023.

"Sentinels of the Sky: The Persistent Threat Detection System." Lockheed Martin.

Smart, Jeffery K. "History of Chemical And Biological Warfare: An American Perspective." Air University.

"The History of Sky Lanterns." EpicFireworks, August 23, 2021.

Tiwari, Sakshi. "Russia Is Launching ‘Military Balloons’ With Corner Reflectors Into Ukraine To Exhaust Its Air Defenses – Kyiv." The EurAsian Times, February 13, 2023.

Whigham, Thomas L. "Brazil's "Balloon Corps": Pride, Desperation, and the Limits of Military Intelligence in the Triple Alliance War." Luso-Brazilian Review, Vol. 52, No. 2 (2015): 1-18.

This statistics video tutorial explains how to make a frequency polygon.

Introduction to Statistics: https://www.youtube.com/watch?v=XZo4xyJXCak

Arithmetic, Geometric, & Harmonic Mean:
https://www.youtube.com/watch?v=6G6i8vSa8Zs

Simple Frequency Tables:
https://www.youtube.com/watch?v=lyRbCwDDnJo

Relative Frequency Distribution Table:
https://www.youtube.com/watch?v=gq3FPpm2yvA

Cumulative Relative Frequency Table:
https://www.youtube.com/watch?v=6hJGa4Zp62M

_________________________________
Dot Plots and Frequency Tables:
https://www.youtube.com/watch?v=Iu17mY1VfZU

Stem and Leaf Plots:
https://www.youtube.com/watch?v=MUCvUgGfzdo

Side By Side Stem and Leaf Plots:
https://www.youtube.com/watch?v=wkAjnGmRPVo

Histograms:
https://www.youtube.com/watch?v=AndS0RLdxtk

How To Make a Frequency Polygon:
https://www.youtube.com/watch?v=y7Wb9AjbRjo

__________________________________
Quartiles, Deciles, & Percentiles:
https://www.youtube.com/watch?v=40o82o3uNfk

Interquartile Range & Outliers:
https://www.youtube.com/watch?v=STSP8gTSdT8

Skewness & Symmetric Distribution:
https://www.youtube.com/watch?v=U0NZu6f5TMI

Sample Mean and Population Mean:
https://www.youtube.com/watch?v=cmtBUWCC-6A

Mean, Median, & Mode - Grouped Data:
https://www.youtube.com/watch?v=zjHfAhcU6kE

____________________________________
Final Exams and Video Playlists:
https://www.video-tutor.net/

Learn how to easily memorize the global winds.
Polar easterlies, westerlies, and trade winds.
Memorize the location, name, and direction that that flow.
Includes the tropical easterlies.
Use the mnemonic device Every wind together in order to help remember the global winds.

This video on Global Winds may help
https://www.youtube.com/watch?v=oCdqGkn-B1E

Learn how to find the area of a circle.The area of a circle uses the formula is pi times radius squared.

Kingdom Mollusca Learn about snails, slugs, squid, and cuttlefish and several other invertebrates found in the phylum Mollusca. Animals in this phylum have soft bodies, many have a shell, a mantle, and a nervous system.
Some common members include snails, slugs, scallops, oysters, octopus, squid, nautilus, and cuttlefish.

Credit for the cuttlefish video:Title: Red cuttle hunting.webm
Author: John Turnbull
Date: 19 July 2014

Difference between Organic and Inorganic Compounds
Organic compounds contain carbon. There are at least four important organic compounds, lipids, proteins, carbohydrates, and nucleic acids.
Inorganic compounds do not contain carbon and usually are more simple compounds.
There are some compounds that contain carbon and are inorganic like carbon dioxide.
*
*
For more Life Science videos and summaries see,
http://www.moomoomath.com/Midd....le-School-Science-an

We hope you are enjoying our large selection of engaging core & elective K-12 learning videos. New videos are added all the time - make sure you come back often to learn more! If you'd like us to cover any additional topics, please let us know. For practice, assessment, and many interactive activities that go along with each video, as well as a teacher/parent dashboard, go to Miacademy.co for Grades K-8 or Miaprep.com for grades 9-12!

In this video, we will teach you about subordinating conjunctions.

We hope you are enjoying this video! For more in-depth learning, check out Miacademy.co (https://www.parents.miacademy.co/), an online learning platform with lessons and practice games that go along with our videos. Use coupon code VIDEOSPECIAL for a discount. Good for homeschoolers, Parents, Teachers, or anyone with kids in grades K-8.

Miacademy also offers many hands-on learning activities including a business simulation, writing in the Miacademy weekly, and creating artwork. Teaching social skills is also one of the key values at Miacademy. On the site, kids can interact safely in a moderated environment and share their artwork, videos, and ideas with each other.

In this video, you will learn about the distributive property over addition.

We hope you are enjoying our large selection of engaging core & elective K-12 learning videos. New videos are added all the time - make sure you come back often to learn more! If you'd like us to cover any additional topics, please let us know.

For practice, assessment, and many interactive activities that go along with each video, as well as a teacher/parent dashboard, go to Miacademy.co for Grades K-8 or Miaprep.com for grades 9-12!

#statistics and probability

Manual: GeoGebra in a Nutshell (from http://school-maths.com) - Square

In the late 1950s and the early to mid-1960s, a Muslim minister named Malcolm X rose to prominence in the United States during the struggle for Civil Rights. Malcolm X was a member of and spokesperson for the Nation of Islam, and he was a vocal advocate for Black empowerment. His views differed significantly from a lot of the well-known Civil Rights activists of the day, and his views evolved during his ministry. Today, we’ll learn about Malcolm X’s origins, his work with the Nation of Islam, his break from that organization, and his eventual assassination.

Clint's book, How the Word is Passed is available now! https://bookshop.org/books/how....-the-word-is-passed-

VIDEO SOURCES
Peniel E. Joseph, Waiting ’ Til the Midnight Hour: A Narrative History of Black Power in America (New York: Henry Holt, 2006).
Malcolm X, The Autobiography of Malcolm X, With the assistance of Alex Haley (New York: Ballantine, 1992).
Manning Marable, Malcolm X: A Life of Reinvention (New York: Viking Press, 2011).
Ilyasah Shabazz, Growing up X: A Memoir by the Mother of Malcolm X (Penguin, 2003).

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The European Renaissance may have started in Florence, but it pretty quickly moved out of Italy and spread the art, architecture, literature, and humanism across Europe to places like France, Spain, England, and the Low Countries.

SOURCES:
Hunt, Lynn et al. The Making of the West: Peoples and Cultures, 6th ed. Boston: Bedford St. Martins, 2019.
Jardine, Lisa. Erasmus, Man of Letters. Princeton: Princeton University Press, 1993.
Donald R. Kelley, Renaissance Humanism. Boston: Twayne, 1991.

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

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Eric Prestemon, Sam Buck, Mark Brouwer, Laura Busby, Zach Van Stanley, Bob Doye, Jennifer Killen, Naman Goel, Nathan Catchings, Brandon Westmoreland, dorsey, Indika Siriwardena, Kenneth F Penttinen, Trevin Beattie, Erika & Alexa Saur, Glenn Elliott, Justin Zingsheim, Jessica Wode, Tom Trval, Jason Saslow, Nathan Taylor, Brian Thomas Gossett, Khaled El Shalakany, SR Foxley, Yasenia Cruz, Eric Koslow, Caleb Weeks, Tim Curwick, D.A. Noe, Shawn Arnold, Malcolm Callis, William McGraw, Andrei Krishkevich, Rachel Bright, Jirat, Ian Dundore
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#crashcourse #history #europeanhistory

This tutorial shows how to find the area of a circle, given a diameter or a radius of a circle.

Join this channel to get access to perks:
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:)

No, David!
by David Shannon

Click here to purchase No, David!: https://www.amazon.com/No-Davi....d-Shannon/dp/0590930

David's mom always said no! No,no,no. No,David! is Shannon's delightfully illustrated book of all the naughty things he used to get told off for as a child. Follow David as he jumps on his bed, walks mud through the house and breaks plant pots.

In which John Green teaches you about the election of 1860. As you may remember from last week, things were not great at this time in US history. The tensions between the North and South were rising, ultimately due to the single issue of slavery. The North wanted to abolish slavery, and the South wanted to continue with it. It seemed like a war was inevitable, and it turns out that it was. But first, the nation had to get through this election. You'll learn how the bloodshed in Kansas and the truly awful Kansas-Nebraska Act led directly to the decrease in popularity of Stephen Douglas, the splitting of the Democratic party, and the unlikely victory of a relatively inexperienced politician from Illinois, Abraham Lincoln. Lincoln's election would lead directly to the secession of several southern states, and thus to the Civil War. John will teach you about all this, plus Dred Scott, Roger Taney, and John Brown.

Hey teachers and students - Check out CommonLit's free collection of reading passages and curriculum resources to learn more about the events of this episode. The Lincoln and Douglass debates of the 1850s fueled the argument over state's rights to decide on slavery and culminated when the two ran against one another in the Election of 1860: https://www.commonlit.org/text....s/the-election-of-18
In response to Lincoln's election, the South seceded from the Union and the Civil War began: https://www.commonlit.org/texts/the-south-secedes

Learn more about the Dred Scott Decision in Crash Course Black American History #16: https://www.youtube.com/watch?v=9VffLWl8asY

Chapters:
Introduction: The Civil War 00:00
The Fugitive Slave Law 0:45
Railroads 2:26
The Kansas-Nebraska Act 3:04
How the Republican Party Formed 3:54
Public Opinion on Free vs. Slave States 4:22
The New Republican Party Gains Traction 5:45
How Kansas Became a State 6:31
The Dred Scott Decision 7:32
Mystery Document 9:14
John Brown & Harpers Ferry 10:25
The Election of 1860 11:13
The Start of the Civil War 12:14
Credits 13:40

Educational video for children to learn how to subtract fractions with the same denominator. To subtract fractions with the same denominator, we leave the common denominator and only subtract the numerators. Let's look at an example! To subtract five ninths minus two ninths, we leave the same denominator in the answer, in this case that would be number 9; and we subtract the numerators, that is, 5 - 2 which equals 3; this would be the numerator in the result which is three ninths (3/9). This educational video includes several exercises with fun examples for children to learn math while having fun. Excellent resource for elementary school.

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Educational video for children in which they will learn the /d/ sound in English. Little ones will discover how to pronounce the sound of the letter D through a fun song and numerous examples alongside our favorite seal, Feli. Phonics is a very successful method used to teach reading through letter sounds. In this simple video for children who are beginning to read, we work on phonemic awareness and phonological awareness, two important skills for early readers and young children who are developing reading skills. It is an interactive video that asks viewers to participate by singing and repeating the sounds along with Feli.

This video is a very useful and interesting resource for children to learn the sounds of the English language. It is an excellent video for preschool, primary, and bilingual education.

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

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

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