When choosing which unit of weight to use, the most common options are pounds and ounces. I don't imagine that weighting you dog in tons is going to be very helpful, do you? Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-fourth-grade-math/cc-4th-measurement-topic/cc-4th-unit-sense/e/unit-sense?utm_source=YT&utm_medium=Desc&utm_campaign=4thgrade Watch the next lesson: https://www.khanacademy.org/math/cc-fourth-grade-math/cc-4th-measurement-topic/cc-4th-unit-conversion/v/time-unit-conversion?utm_source=YT&utm_medium=Desc&utm_campaign=4thgrade Missed the previous lesson? https://www.khanacademy.org/math/cc-fourth-grade-math/cc-4th-measurement-topic/cc-4th-unit-sense/v/unit-sense-example-for-exercise?utm_source=YT&utm_medium=Desc&utm_campaign=4thgrade Grade 4th on Khan Academy: 4th grade is the time to start really fine-tuning your arithmetic skills. Not only will you be a multi-digit addition and subtraction rockstar, but you'll extend the multiplication and division that you started in 3rd grade to several digits. You'll also discover that you sometimes have something left over (called a "remainder") when you divide. In 3rd grade you learned what a fraction is. Now you'll start adding, subtracting, multiplying, and comparing them. You'll also see how they relate to decimals. On other fronts, you'll learn how to convert between different units (which is super important when comparing the size and speed of robot unicorns in different countries) and continue your journey thinking about various shapes in two dimensions. Some of the foundational concepts of geometry (like lines, rays and angles) also get introduced. As always, we'll round this out with a healthy dose of applied word problems and explorations of number patterns and properties (including the ideas of factors, multiples and prime numbers). The fun must not stop! (Content was selected for this grade level based on a typical curriculum in the United States.) ... https://www.youtube.com/watch?v=V1LloSp4PV4 Note: All Khan Academy content is available for free at (www.khanacademy.org)

John Dickerson discusses the history and the significance of the Articles of Confederation. John Dickerson is co-host of CBS This Morning. He was previously CBS News' Chief Washington Correspondent, Political Director and anchor of Face The Nation. Dickerson is also a contributor to Slate's Political Gabfest and to The Atlantic. During the 2016 presidential campaign, Dickerson moderated CBS News' two presidential debates. Prior to CBS, Dickerson was Slate Magazine's Chief Political correspondent and covered politics for twelve years for Time magazine. View more lessons or practice this subject at https://www.khanacademy.org/humanities/us-government-and-civics/government-civics-with-cbss-john-dickerson 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! Donate here: https://www.khanacademy.org/donate?utm_source=youtube&utm_medium=desc Volunteer here: https://www.khanacademy.org/contribute?utm_source=youtube&utm_medium=desc ... https://www.youtube.com/watch?v=evPP1FDePOY Note: All Khan Academy content is available for free at (www.khanacademy.org)

Learn what device security is, and how it protects your phones, tablets, and computers from being accessed and exploited by cybercriminals. To learn more about how you can keep yourself safe while on the Internet, visit: internet-safety.khanacademy.org ... https://www.youtube.com/watch?v=h-cmy7Iq6g4 Note: All Khan Academy content is available for free at (www.khanacademy.org)

CAHSEE Practice: Problems 52-53. Created by Sal Khan. This is the last video in our CAHSEE subject! Now move on to our first video in AP Art Histroy: https://www.khanacademy.org/humanities/art-history-basics/beginners-art-history/v/why-look-at-art?utm_source=YT&utm_medium=Desc&utm_campaign=APAryHistory Missed the previous lesson? https://www.khanacademy.org/test-prep/cahsee-subject/cahsee/v/cahsee-practice-problems-47-51?utm_source=YT&utm_medium=Desc&utm_campaign=CAHSEE CAHSEE on Khan Academy: Sal working through the 53 problems from the practice test available at http://www.cde.ca.gov/ta/tg/hs/documents/mathpractest.pdf for the CAHSEE (California High School Exit Examination). Clearly useful if you're looking to take that exam. Probably still useful if you want to make sure you have a solid understanding of basic high school math. 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. ... https://www.youtube.com/watch?v=FdD0Wu032R4 Note: All Khan Academy content is available for free at (www.khanacademy.org)