Virtual Image. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/physics/geometric-optics/mirrors-and-lenses/v/parabolic-mirrors-and-real-images?utm_source=YT&utm_medium=Desc&utm_campaign=physics Missed the previous lesson? https://www.khanacademy.org/science/physics/geometric-optics/reflection-refraction/v/dispersion?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. ... https://www.youtube.com/watch?v=nrOg85VPQgw Note: All Khan Academy content is available for free at (www.khanacademy.org)

Do you wish that your students could overcome frustration or deal with mistakes in a healthy, positive way? Have you wanted to implement growth mindset in your classroom but need a few pointers? Find out how you can foster growth mindset in your classroom this school year with LearnStorm growth mindset activities. Three experts in the growth mindset research field will explain what it’s all about: - Dave Paunesku: Founding director of PERTS, a center at Stanford University that helps educators apply insights from the behavioral sciences to create safe and engaging learning environments to foster student motivation and resilience. We partnered with Dave and PERTS for the development of the LearnStorm growth mindset activities. - Annie Brock: A former teacher and author of The Growth Mindset Coach, a month-by-month guide to implementing growth mindset in your classroom. - Samala Robinson: A current fourth-grade teacher in Independence, Missouri who has developed creative ways to foster positive learning mindsets. Khan Academy hosted this free growth mindset livestream on September 20 at 6:00 p.m. EST/3:00 p.m. PDT. ... https://www.youtube.com/watch?v=xQAhN0qEbhU Note: All Khan Academy content is available for free at (www.khanacademy.org)

Identifying inflection points from graphs of function, first derivative and second derivative. Graphs are done using Desmos.com. Watch the next lesson: https://www.khanacademy.org/math/ap-calculus-ab/ab-derivatives-analyze-functions/ab-justification-with-second-derivative/v/calculus-based-justification-using-second-derivative-max?utm_source=YT&utm_medium=Desc&utm_campaign=APCalculusAB Missed the previous lesson? https://www.khanacademy.org/math/ap-calculus-ab/ab-derivatives-analyze-functions/ab-concavity/v/inflection-points-graphically-given-function?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. ... https://www.youtube.com/watch?v=YBQUw0NhqgU Note: All Khan Academy content is available for free at (www.khanacademy.org)

More free lessons at: http://www.khanacademy.org/video?v=4cxjvAPs92o ... https://www.youtube.com/watch?v=4cxjvAPs92o Note: All Khan Academy content is available for free at (www.khanacademy.org)