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Plotting complex numbers on the complex plane | Precalculus | Khan Academy Teacherflix 47 Views • 2 years ago

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/ma....th/algebra2/x2ec2f6f

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

Watch the next lesson: https://www.khanacademy.org/math/precalculus/imaginary_complex_precalc/complex_num_precalc/v/complex-number-addition?utm_source=YT&utm_medium=Desc&utm_campaign=Precalculus

Missed the previous lesson?
https://www.khanacademy.org/math/precalculus/imaginary_complex_precalc/complex_num_precalc/v/complex-number-intro?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.

For free. For everyone. Forever. #YouCanLearnAnything

Subscribe to Khan Academy’s Precalculus channel:
https://www.youtube.com/channe....l/UCBeHztHRWuVvnlwm2
Subscribe to Khan Academy: https://www.youtube.com/subscr....iption_center?add_us

English Grammar Course For Beginners: Basic English Grammar Teacherflix 23 Views • 2 years ago

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

English Grammar Course MINI Quiz (25 Questions):https://shawenglish.com/course....s/beginner-1-learn-b

👉Free English Video Classes and Community Chat
Join our WhatsApp: https://forms.gle/ogU1L5aws55DQLDf8

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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Three Best free AI tools for teachers | ai for teachers | Lesson plan & resources Teacherflix 28 Views • 2 years ago

Why Are Timed Math Drills Bad for Kids? Teacherflix 37 Views • 2 years ago

Why are timed math drills bad for kids? And how do timed math drills promote math anxiety?

Let's explore the research of Stanford Professor Jo Boaler, the author of Mathematical Mindsets, concerning why timed math tests amplify math anxiety and turn students, especially girls, away from math. To reform math education, we need to shift the focus to a growth mindset for math and onto achieving deep mathematical understanding.

BLOG: Are Timed Math Tests Harmful to Students? http://bit.ly/2bl1Ryc

This presentation was made using Adobe Spark.

★Learn more about the work of Jo Boaler: http://www.youcubed.org

★ Want more FREE weekly math videos? Subscribe Now: http://bit.ly/1OVJnyh

★★ Why Math? Download YOUR Free eBook: http://www.mashupmath.com/resources/

★★★ Learn More About Anthony: http://bit.ly/1KQ1Td3

Image Credit: Emojis provided free by http://emojione.com

Jo Boaler: Stanford researcher, professor of math education and author of the acclaimed book, Mathematical Mindsets.

Math anxiety has now been recorded in students as young as five, and timed tests are a major cause of this debilitating, often lifelong condition.

Timed tests evoke such strong emotions that students often come to believe that being fast with math facts is the essence of mathematics.

This misguided emphasis on speed and memorization has resulted in high numbers of students dropping out of mathematics.

Brain research shows us that under the stress of time pressure, working memory can become blocked, leaving students unable to retrieve what they already know.

The blocking of the working memory and associated anxiety is particularly common among higher-achieving students and girls.

When schools make learning math an anxiety-provoking experience, we turn students away.

The best way to learn math facts is to through mathematical activities that focus understanding number relationships.

This authentic understanding is best achieved through taking the time to think deeply about number strategies. which takes time.

Yet, many people believe that mathematics is only about calculating -- and that the best mathematics thinkers are those who can calculate the fastest.

In truth, skilled mathematicians are often slow with math, because they take the time to think carefully and deeply about mathematics.

We need our students to become powerful thinkers
who can make connections, think logically, and solve complex problems.

To achieve this goal, we must shift the focus of math education away rapid calculation and towards deep mathematical thinking and understanding

This movement in education reform is gaining momentum and your input helps. Please join the conversation and share your thoughts in the comments.

You can learn more about the supporting research and the work of Jo Boaler at YouCubed.org

Our lessons are perfect for flipped classroom math teachers and students. This lesson is aligned with the common core learning standards for math and the SAT math curriculum as well.

MashUp Math is a great free resource for math students, parents, and teachers. Our lessons are a great resource for struggling students, flipped classroom educators, and homeschool math students.

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Our Mission: MashUp Math is our creative solution to reviving students' passion and interest for learning mathematics. As young educators, we know that all students learn math differently and that a one-size-fits-all approach is simply ineffective. The idea that the ability to understand mathematics is reserved for a select few did not sit well with us.

In addition to sharing free teacher resources (which are teacher created resources) in the form of teacher worksheets, we share new YouTube math videos every week that help math teachers and students to better understand mathematics and the common core. Our lessons can be aligned with the common core standards for common core math and are immensely popular with flipped learning educators and anyone experimenting with flipped classroom learning.

As educators, we know what it takes to be a super math teacher and that we can’t always do it alone. In addition to our cool math videos, we share articles, blogs, inspirational quotes, teacher math worksheets, and math worksheets.

Many of our users serve as a special education teacher and use our cool videos to support their special education students with special needs. Our free online math lessons are also high adaptable to your homeschool curriculum and should be added to your list of free homeschool resources.

Riemann sums in summation notation | Accumulation and Riemann sums | AP Calculus AB | Khan Academy Teacherflix 25 Views • 2 years ago

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

Generalizing the technique of approximating area under a curve with rectangles. Created by Sal Khan.

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/ap-calculus-ab/ab-accumulation-riemann-sums/ab-riemann-sums-in-summation-notation/e/riemann-sums-and-sigma-notation?utm_source=YT&utm_medium=Desc&utm_campaign=APCalculusAB

Watch the next lesson: https://www.khanacademy.org/math/ap-calculus-ab/ab-accumulation-riemann-sums/ab-riemann-sums-in-summation-notation/v/practice-approximating-area-under-curve?utm_source=YT&utm_medium=Desc&utm_campaign=APCalculusAB

Missed the previous lesson? https://www.khanacademy.org/math/ap-calculus-ab/ab-accumulation-riemann-sums/ab-summation-notation/v/summation-notation-worked-examples?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