In this short meditation session, Sal introduces a simple visualization technique to help you separate yourself from your thoughts and quiet them. What did you think of this meditation? Let us know in the comments below! ... https://www.youtube.com/watch?v=ZEYuSRHgmCg Note: All Khan Academy content is available for free at (www.khanacademy.org)

More on problem 8 on page 654 and 9-11. https://www.youtube.com/watch?v=bOKhHf58978

Sal finds the next term in the geometric sequence -1/32, 1/8, -1/2, 2,... Watch the next lesson: https://www.khanacademy.org/math/high-school-math/math1/math1-sequences/math1-introduction-to-geometric-sequences/v/using-explicit-formulas-of-geometric-sequences?utm_source=YT&utm_medium=Desc&utm_campaign=highschoolmath Missed the previous lesson? https://www.khanacademy.org/math/high-school-math/math1/math1-sequences/math1-introduction-to-geometric-sequences/v/geometric-sequences-introduction?utm_source=YT&utm_medium=Desc&utm_campaign=highschoolmath High School Math on Khan Academy: Did you realize that the word "algebra" comes from Arabic (just like "algorithm" and "al jazeera" and "Aladdin")? And what is so great about algebra anyway? This tutorial doesn't explore algebra so much as it introduces the history and ideas that underpin it. 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=yZ-GufE_uyA Note: All Khan Academy content is available for free at (www.khanacademy.org)

When we don't have enough of something, we sometimes borrow it. Same in math! When there aren't enough tens (or hundreds, etc) to subtract with, we can borrow (also called regrouping). Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/arithmetic/addition-subtraction/sub_borrowing/e/subtraction_4?utm_source=YT&utm_medium=Desc&utm_campaign=Arithmetic Watch the next lesson: https://www.khanacademy.org/math/arithmetic/addition-subtraction/sub_borrowing/v/regrouping-twice-when-subtracting-three-digit-numbers?utm_source=YT&utm_medium=Desc&utm_campaign=Arithmetic Missed the previous lesson? https://www.khanacademy.org/math/arithmetic/addition-subtraction/sub_borrowing/v/basic-regrouping-or-borrowing-when-subtracting-three-digit-numbers?utm_source=YT&utm_medium=Desc&utm_campaign=Arithmetic Arithmetic on Khan Academy: So you're ready to have some arithmetic fun? You've come to the right spot! It's the first "official" math topic and chalked full of fun exercises and great videos which help you start your journey towards math mastery. We'll cover the big ones: addition, subtraction, multiplication, and division, of course. But we don't stop there. We'll get into negative numbers, absolute value, decimals, and fractions, too. Learning math should be fun, and we plan on having some with you. Ready to get started? ... https://www.youtube.com/watch?v=QOtam19NQcQ Note: All Khan Academy content is available for free at (www.khanacademy.org)