Top videos
This video explains how to calculate the concentration of the solution in forms such as Molarity, Molality, Volume Percent, Mass Percent, and Mole Fraction. It also explains how to calculate the Molarity of the solution given mass percent and density.
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PDF Worksheet - 17 Practice Problems:
https://bit.ly/3QpptSk
Chemistry PDF Worksheets:
https://www.video-tutor.net/ch....emistry-basic-introd
________________________________________
Full 1 Hour 20 Minute Video on YouTube:
https://www.youtube.com/watch?v=NL8quYmMOMs
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FUN! In these language arts learning videos for kids learn about nouns, verbs, adjectives, prepositions, pronouns and much more! This engaging videos will help children learn language arts in a way they will remember!
00:00 Common and proper nouns
12:17 Adjectives
21:04 Action verbs
28:53 Pronouns
38:32 Rhyming
41:08 Prepositions
51:26 Prepositional phrases
1:00:26 Synonyms
1:05:29 Antonyms
1:11:06 Sentence fragments
1:19:38 Run-on sentences
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Practice this lesson yourself on KhanAcademy.org right now:
https://www.khanacademy.org/math/precalculus/precalc-matrices/matrix-equations/e/writing-systems-of-equations-as-matrix-equations?utm_source=YT&utm_medium=Desc&utm_campaign=Precalculus
Watch the next lesson: https://www.khanacademy.org/math/precalculus/precalc-matrices/reduced_row_echelon/v/matrices-reduced-row-echelon-form-1?utm_source=YT&utm_medium=Desc&utm_campaign=Precalculus
Missed the previous lesson?
https://www.khanacademy.org/math/precalculus/precalc-matrices/matrix-equations/v/matrix-equations-systems?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
This physics video tutorial explains how to solve complex DC circuits using kirchoff's law. Kirchoff's current law or junction rule states that the total current entering a junction is equal to the total current leaving the junction. Kirchoff's voltage law or loop rule states that the sum of all the voltages around a loop must add to zero. You need to be able to distinguish a voltage drop from a voltage lift. In addition, you need to be familiar with ohm's law when dealing with loop rule using kirchoff's law. This video contains plenty of examples and practice problems on KCl & KVl circuit analysis.
Schematic Diagrams & Symbols:
https://www.youtube.com/watch?v=Dl1gFBNa0Ik
Resistors In Series:
https://www.youtube.com/watch?v=9z53qVQjasU
Resistors In Parallel:
https://www.youtube.com/watch?v=SYrOiQs3X2U
Series and Parallel Circuits - Light Bulb Brightness:
https://www.youtube.com/watch?v=NjgxXcBfIII
Equivalent Resistance of Complex Circuits:
https://www.youtube.com/watch?v=kjW4H3fKi8o
How To Solve DC Circuits:
https://www.youtube.com/watch?v=eFlJy0cPbsY
_________________________
Voltage Divider Circuit:
https://www.youtube.com/watch?v=JGXdi7XcQi8
Current Dividers:
https://www.youtube.com/watch?v=PpfOH_uBKCw
Parallel Circuit Challenge Problem:
https://www.youtube.com/watch?v=y-gwr8LCHKo
Kirchhoff's Current Law:
https://www.youtube.com/watch?v=Q39xQUlTGew
Kirchhoff's Voltage Law:
https://www.youtube.com/watch?v=6F_rmZ1nXFQ
DC Circuits Review:
https://www.youtube.com/watch?v=wejz5s31Cts
____________________________
Thevenin's Theorem - Circuit Analysis:
https://www.youtube.com/watch?v=zTDgziJC-q8
Norton's Theorem - Circuit Analysis:
https://www.youtube.com/watch?v=-kkvqr1wSwA
Superposition Theorem:
https://www.youtube.com/watch?v=EX52BuZxpQM
Maximum Power Transfer:
https://www.youtube.com/watch?v=8CA6ZNXgI-Y
Physics PDF Worksheets:
https://www.video-tutor.net/ph....ysics-basic-introduc
Greek Hoplites were heavy infantry soldiers, citizen-soldiers who equipped themselves when called to fight for the poleis or city-state.
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Credit:
Created by Daniel Turner
Narrator:
Chris Kane
https://vocalforge.com/
Music Credit:
Hero's Theme by Twin Musicom is licensed under a Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/)
Source: http://www.twinmusicom.org/song/280/heros-theme
Artist: http://www.twinmusicom.org
Firesong by Kevin MacLeod is licensed under a Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/)
Source: http://incompetech.com/music/r....oyalty-free/index.ht
Artist: http://incompetech.com/
Sources:
Greek Hoplite vs Persian Warrior: 499–479 BC
By Chris McNab
Historical Dictionary of Ancient Greek Warfare
By Iain Spence
Spartan Warrior 735–331 BC
By Duncan B Campbell
Athenian Democracy at War
By David M. Pritchard
The Hutchinson Dictionary of Ancient and Medieval Warfare
edited by Peter Connolly, John Gillingham, John Lazenby
Follow along with Ashely and Mia as they teach you about indefinite pronouns.
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 we start a new series on sport science basics.
These videos are designed to help you learn the basics of statistics, data, and sport science analysis so that you are able to answer your related questions. In the first video we will work through calculating descriptive statistics on our dataset.
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Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/ma....th/multivariable-cal
Example of calculating the flux across a surface by using the Divergence Theorem
Watch the next lesson: https://www.khanacademy.org/math/multivariable-calculus/divergence_theorem_topic/divergence_theorem/v/why-we-got-zero-flux-in-divergence-theorem-example-1?utm_source=YT&utm_medium=Desc&utm_campaign=MultivariableCalculus
Missed the previous lesson?
https://www.khanacademy.org/math/multivariable-calculus/divergence_theorem_topic/divergence_theorem/v/3-d-divergence-theorem-intuition?utm_source=YT&utm_medium=Desc&utm_campaign=MultivariableCalculus
Multivariable Calculus on Khan Academy: Think calculus. Then think algebra II and working with two variables in a single equation. Now generalize and combine these two mathematical concepts, and you begin to see some of what Multivariable calculus entails, only now include multi dimensional thinking. Typical concepts or operations may include: limits and continuity, partial differentiation, multiple integration, scalar functions, and fundamental theorem of calculus in multiple dimensions.
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 KhanAcademy’s Multivariable Calculus channel:
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Subscribe to KhanAcademy: https://www.youtube.com/subscr....iption_center?add_us
This physics video tutorial explains how to calculate the magnitude of the electric dipole moment and its direction. An electric dipole is simply the combination of a positive charge and a negative charge that have the same magnitude but opposite signs. This video shows you how to calculate the forces exerted on a dipole, the rotational torque acting on it, the potential energy due to its rotation in an electric field, and the work required to rotate it from one angular position to another. This video involves some knowledge of calculus and integration of trigonometric functions such as sine and cosine. This video contains a few practice problems and examples.
Physics 2 - Basic Introduction:
https://www.youtube.com/watch?v=rHgKLIYcZOI
Electric Charge - Physics:
https://www.youtube.com/watch?v=VD009jiZreo
Conservation of Electric Charge:
https://www.youtube.com/watch?v=OSUvXC1pACA
Coulomb's Law and Electric Force:
https://www.youtube.com/watch?v=kCp5yYjo9zE
Electric Fields:
https://www.youtube.com/watch?v=V9RLc9EX1so
________________________
Electric Flux:
https://www.youtube.com/watch?v=q1eor6oIuUo
Gauss Law Problems:
https://www.youtube.com/watch?v=IS1hyHBh3QQ
Electric Potential:
https://www.youtube.com/watch?v=LzKMQByFSLc
Equipotential Lines:
https://www.youtube.com/watch?v=j_Cy891cmIY
_______________________
The Electron Volt:
https://www.youtube.com/watch?v=DjQl4J-jePc
Electric Potential Energy:
https://www.youtube.com/watch?v=KoZ61FujkRk
Physics PDF Worksheets:
https://www.video-tutor.net/ph....ysics-basic-introduc
Are you looking for innovative ways to engage your students in learning? ChatGPT, the cutting-edge language model powered by OpenAI, can help! In this video, we'll show you how to use ChatGPT in education and provide a 101 prompts PDF that you can use to spark creativity and critical thinking in your classroom.
We will cover the basics of using ChatGPT, including inputting prompts, customizing the output, and evaluating the responses. We'll also share 101 prompts that you can use in your classroom, ranging from fun trivia questions to thought-provoking writing prompts.
So if you're ready to take your teaching to the next level, join us for "101 ChatGPT Prompts for Teachers" and discover the power of this innovative tool in education. Don't forget to like, comment, and subscribe for more educational content!
101 Chat GPT Prompts for Teachers PDF
📃 https://integratedteacher.ck.page/fdfde5c337
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Watch 50 Free Tech Tools for Teachers & Get the PDF!
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Faction: The German Army
The First World War
Germany was recognised as having the most efficient army in the world. It utilized mass conscription for short-term military service followed by a longer period in reserves.
Emphasis was placed on high quality training while maintaining a high number of experienced senior officers.
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Get your copy of Simple History: World War I today!
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Simple history gives you the facts, simple!
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Credit:
Narrator:
Bryan 'Lazlo' Beauregard
Animation:
Daniel Turner
Artwork:
Daniel turner
Music Credit
Ross Bugden- 'Drive'
‘Creative Commons Attribution 4.0 International License’.
Sources: http://spartacus-educational.com/FWWinGermany.htm
Pictures: Wikimedia Commons (Public Domain)
Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/linear-algebra/vectors_and_spaces/vectors/e/scaling_vectors?utm_source=YT&utm_medium=Desc&utm_campaign=LinearAlgebra
Watch the next lesson: https://www.khanacademy.org/math/linear-algebra/vectors_and_spaces/vectors/v/linear-algebra-vector-examples?utm_source=YT&utm_medium=Desc&utm_campaign=LinearAlgebra
Missed the previous lesson?
https://www.khanacademy.org/math/linear-algebra/vectors_and_spaces/vectors/v/adding-vectors?utm_source=YT&utm_medium=Desc&utm_campaign=LinearAlgebra
Linear Algebra on Khan Academy: Have you ever wondered what the difference is between speed and velocity? Ever try to visualize in four dimensions or six or seven? Linear algebra describes things in two dimensions, but many of the concepts can be extended into three, four or more. Linear algebra implies two dimensional reasoning, however, the concepts covered in linear algebra provide the basis for multi-dimensional representations of mathematical reasoning. Matrices, vectors, vector spaces, transformations, eigenvectors/values all help us to visualize and understand multi dimensional concepts. This is an advanced course normally taken by science or engineering majors after taking at least two semesters of calculus (although calculus really isn't a prereq) so don't confuse this with regular high school algebra.
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 KhanAcademy’s Linear Algebra channel:: https://www.youtube.com/channe....l/UCGYSKl6e3HM0PP7QR
Subscribe to KhanAcademy: https://www.youtube.com/subscr....iption_center?add_us
Sal solves practice problems where he thinks about which data displays would be helpful in which situations.
Practice this lesson yourself on KhanAcademy.org right now:
https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-data-statistics/cc-7th-compare-data-displays/e/comparing-data-displays?utm_source=YT&utm_medium=Desc&utm_campaign=6thgrade
Watch the next lesson: https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-data-statistics/cc-6-shape-of-data/v/shapes-of-distributions?utm_source=YT&utm_medium=Desc&utm_campaign=6thgrade
Missed the previous lesson? https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-data-statistics/cc-6-mad/v/mean-absolute-deviation-example?utm_source=YT&utm_medium=Desc&utm_campaign=6thgrade
Grade 6th on Khan Academy: By the 6th grade, you're becoming a sophisticated mathemagician. You'll be able to add, subtract, multiply, and divide any non-negative numbers (including decimals and fractions) that any grumpy ogre throws at you. Mind-blowing ideas like exponents (you saw these briefly in the 5th grade), ratios, percents, negative numbers, and variable expressions will start being in your comfort zone. Most importantly, the algebraic side of mathematics is a whole new kind of fun! And if that is not enough, we are going to continue with our understanding of ideas like the coordinate plane (from 5th grade) and area while beginning to derive meaning from data! (Content was selected for this grade level based on a typical curriculum in the United States.)
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 AcademyÂês 6th grade channel:
https://www.youtube.com/channe....l/UCnif494Ay2S-PuYlD
Subscribe to Khan Academy: https://www.youtube.com/subscr....iption_center?add_us
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
Scientific evidence suggests that the secret to thriving students and a good education are amazing teachers. To teach with us, gift a video or if you want Sprouts to make videos that teach your student or employees, contact us. Just visit http://patreon.com/sprouts
Add you favorite teachers to our playlist:
https://www.youtube.com/playlist?list=PLTp9Bu0cTGUzxe-zSFqVZCFmUh51otfDw&jct=37aFM_gENmVNgsjqXk85mQVocQEfTA
4 GREAT TEACHERS
Michael J. Sandel teaching Justice
https://www.youtube.com/watch?v=kBdfcR-8hEY
Robert Sapolsky teaching Introduction to Human Behavioral Biology
https://www.youtube.com/watch?v=NNnIGh9g6fA
Walter Lewin teaching Physics
https://www.youtube.com/watch?v=4a0FbQdH3dY
Mr. Hester Managing a Classroom
https://www.youtube.com/watch?v=geLvLd3uosk
ADD YOURS TO OUR PLAYLIST
https://www.youtube.com/playlist?list=PLTp9Bu0cTGUzxe-zSFqVZCFmUh51otfDw&jct=vP0U3P5UeAPMRQGBsSKCgsna9ak1Aw
Source:
Eric Hanucheck
http://hanushek.stanford.edu
Raj Chetty
Professor of Economics, Stanford University
http://www.rajchetty.com/chett....yfiles/value_added.h http://www.equality-of-opportu....nity.org/assets/docu
Cold Calling
https://www.youtube.com/watch?v=PARfIwF215k&list=PLPkJlPMF7vNsn8UmmQQwIC4sJYhQ2krrT&index=2
Sposato School of Education
http://www.sposatogse.org/
Teachers Effectiveness
http://scholar.harvard.edu/fil....es/fryer/files/dobbi
Time Spend by Principles
https://web.stanford.edu/~sloe....b/papers/Principal%2
What makes Teaching Great
http://www.suttontrust.com/wp-....content/uploads/2014
What Matters in School is Good Teaching
https://www.economist.com/news..../leaders/21700383-wh
Full Video Script:
https://docs.google.com/docume....nt/d/10Vv-jjXmmwpOIT
This chemistry video tutorial explains how the photoelectric effect works. It also explains how to use the work function of metals to calculate the threshold frequency and maximum wavelength of light necessary to eject an electron off the surface of an active metal. In addition, it explains how to calculate the speed of an electron as well as the kinetic energy of an electron in electron volts. You need to know how to convert electron volts to joules and vice versa. This video provides all of the formulas and equations needed including plenty of practice problems and examples.
Speed of Light, Frequency, Wavelength:
https://www.youtube.com/watch?v=LgYMxH1LCdo
Photon Energy:
https://www.youtube.com/watch?v=PYNSopwd1l4
The Photoelectric Effect:
https://www.youtube.com/watch?v=-LECEvusk8E
De Broglie Wavelength:
https://www.youtube.com/watch?v=cYyFPFU6s_A
The Bohr Model of Hydrogen:
https://www.youtube.com/watch?v=mXxsT1ut35Q
Heisenberg's Uncertainty Principle:
https://www.youtube.com/watch?v=BNYz5EKXVeI
________________________________
Intro to Quantum Numbers:
https://www.youtube.com/watch?v=eRIN9CPDrpo
Orbitals & Atomic Energy Levels:
https://www.youtube.com/watch?v=4sLXUr2HWIs
Maximum Number of Electrons:
https://www.youtube.com/watch?v=UNE-7AuiMGs
Intro to Electron Configuration:
https://www.youtube.com/watch?v=NIwcDnFjj98
Electron Configuration Exceptions:
https://www.youtube.com/watch?v=Ur2PuzJ7KWs
Noble Gas Notation:
https://www.youtube.com/watch?v=6MAKMnZdfbs
Electron Configuration of Ions:
https://www.youtube.com/watch?v=nlZa8lN_-Ds
_______________________________
Orbital Diagrams:
https://www.youtube.com/watch?v=6dRdMy9tgzE
Paired & Unpaired Electrons:
https://www.youtube.com/watch?v=xwWJf48yfNs
Aufbau's Principle & Hund's Rule:
https://www.youtube.com/watch?v=C6afrc1QS6Y
Paramagnetic & Diamagnetic Elements:
https://www.youtube.com/watch?v=SO983iq9GaI
Valence Electrons & Periodic Table:
https://www.youtube.com/watch?v=FPk2ziB9iX0
Effective Nuclear Charge:
https://www.youtube.com/watch?v=JDsMR1bHGO4
_________________________________
Slater's Rule:
https://www.youtube.com/watch?v=TaYUOiEe6OA
How To Identify The Element:
https://www.youtube.com/watch?v=4qwJIJUaIeQ
Quantum Numbers - Mega Review:
https://www.youtube.com/watch?v=lPptuKlCM6k
Quantum Numbers - Practice Test:
https://www.youtube.com/watch?v=E-nOH18dF-c
Final Exams and Video Playlists:
https://www.video-tutor.net/
Full-Length Videos and Worksheets:
https://www.patreon.com/MathSc....ienceTutor/collectio
Ordinal Numbers by Jack Hartmann is an ordinal number song. In this version we use the calendar and students repeat the ordinal number after Jack. Follow the exercise for each set to build body and brain connections. Let's learn the ordinal numbers in this ordinal numbers for kindergarten video. Ordinal numbers for kids song.
Lyrics
Let's learn the ordinal numbers as we all work out
Let's learn the ordinal numbers repeat after me out loud
Ordinal numbers help us learn in many ways
They tell us the exact position or place
Stretch your arms the best you can and say the ordinal numbers after me
From 1st to 10th
1st
2nd
3rd
4th
5th
6th
7th
8th
9th
10th
Do leg squats the best you can and say the ordinal numbers after me
From 11th to 20th
11th
12th
13th
14th
15th
16th
17th
18th
19th
20th
Twist your body the best you can and say the ordinal numbers after me
From 21st to 31st
21st
22nd
23rd
24th
25th
26th
27th
28th
29th
30th
31st
Ordinal numbers help us learn in many ways
They tell us the exact position or place
Let's learn the ordinal numbers
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Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/ma....th/cc-seventh-grade-
Based on past experience, we can make reasonable estimates of the likelihood of future events.
Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-seventh-grade-math/cc-7th-probability-statistics/cc-7th-basic-prob/e/finding-probability?utm_source=YT&utm_medium=Desc&utm_campaign=7thgrade
Watch the next lesson: https://www.khanacademy.org/math/cc-seventh-grade-math/cc-7th-probability-statistics/cc-7th-basic-prob/v/intuitive-sense-of-probabilities?utm_source=YT&utm_medium=Desc&utm_campaign=7thgrade
Missed the previous lesson?
https://www.khanacademy.org/math/cc-seventh-grade-math/cc-7th-probability-statistics/cc-7th-basic-prob/v/probability-1-module-examples?utm_source=YT&utm_medium=Desc&utm_campaign=7thgrade
Grade 7th on Khan Academy: 7th grade takes much of what you learned in 6th grade to an entirely new level. In particular, you'll now learn to do everything with negative numbers (we're talking everything--adding, subtracting, multiplying, dividing, fractions, decimals... everything!). You'll also take your algebraic skills to new heights by tackling two-step equations. 7th grade is also when you start thinking about probability (which is super important for realizing that casinos and lotteries are really just ways of taking money away from people who don't know probability) and dig deeper into the world of data and statistics. Onward! (Content was selected for this grade level based on a typical curriculum in the United States.)
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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In the final years of the First World War, the Russian Empire was coming to its end. It had been devastated by revolution and finally transformed into the first Communist country in the World. In the years following the Revolution, non-Russian nations that lived under the House of Romanov sought to secure their long-lost independence. One of these was Ukrainе. From 1917 until 1921, the Ukrainians had struggled to build and secure an independent country, fighting against the new regime, against their neighbors in the west, and also among themselves.
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Created by Daniel Turner (B.A. (Hons) in History, University College London)
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Sources:
Magocsi, Paul R. A history of Ukraine. University of Toronto Press, 1996.
Plokhy, Serhii. The Gates of Europe: A History of Ukraine. Basic Books, 2021.
Reid, Anna. Borderland: A Journey through the History of Ukraine. Weidenfeld Et Nicolson, 2015.
Subtelny, Orest. Ukraine a History. Univ. of Toronto Press, 2012.
Ukrainian-Soviet War, 1917–21. Encyclopedia of Ukraine.