Curated Video
Solving Logarithms
New ReviewA video entitled "Solving Logarithms" which walks through how to solve logarithmic equations by setting the insides equal when the logs have the same base.
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Unit Rates
New ReviewA video entitled "Unit Rates" that covers the process of converting units to find real-world quantities.
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Lines Through The Y-Axis
New ReviewA video entitled "Lines through the y-Axis" that covers writing equations of lines graphed on the coordinate plane.
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Lines Through The Origin
New ReviewA video entitled "Lines through the Origin" that covers the process of graphing linear equations of the form y equals mx.
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ID Functions By Equation
New ReviewA video entitled "ID Functions by Equation" that covers characteristics of equations that are functions and characteristics of equations that are not functions.
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Graph Linear Intercepts
New ReviewA video entitled "Graph Linear Intercepts" that covers the process of graphing a linear equation using its x- and y-intercepts.
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Graph Key Quadratic Features
New ReviewA video entitled "Graph Key Quadratic Features" that covers the process of graphing a quadratic function using its intercepts and vertex.
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How to Find Discounts and Markups Using the Percent Equation | 7.RP.3 .2
New ReviewLearn how to calculate *discounts* and *markups* like a pro with Mrs. C! In this lesson, you’ll discover two easy ways to figure out sale prices and original prices: • *Percent Equation Method* (a = p × w) • *Shortcut Method* (100% −...
Curated Video
The Fine-Structure Constant: A Number That Shaped the Universe
New ReviewThis constant represented by the Greek letter alpha is just a dimensionless number, so no matter what units you use, it will always have the same value, about 1/137. If it was different by just 4%, life may not exist. What is the Fine...
Curated Video
Quantum Physics and Consciousness: Clarifying the Misconceptions
New ReviewQuantum physics simplified. Are Consciousness and Free Will linked to quantum mechanics? The double slit experiment explained. What is the difference between observation and measurement? Since Quantum Mechanics is the basis of all modern...
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The Bizarre Behavior of Quantum Particles
New ReviewWhat is the meaning of superposition and wave/particle duality? What do quantum particles really look like, when we are NOT looking? All quantum particles exist in a state of superposition prior to any interaction. This does not mean...
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Copenhagen vs. Many Worlds: Two Views of Quantum Mechanics Explained
New ReviewPhysicists know how to use the equations of quantum mechanics to predict things, but don't really understand what is fundamentally going on. The primary challenge is that according to the equations of QM, all particles exist in a state...
Professor Dave Explains
Special Second-Order Differential Equations: Cauchy-Euler, Nonlinear, and More
We've covered the basics regarding second-order differential equations and their solutions, for both linear homogenous and nonhomogenous differential equations. Now let's look at some special second-order types, such as Cauchy-Euler, and...
Professor Dave Explains
Systems of Differential Equations Part 1: Modeling and Elimination
Did you know that we can use systems of differential equations to model real world situations? It's true! Let's go through a concrete example from start to finish, to show how we can describe the scenario, come up with equations that...
Curated Video
Static Equilibrium & Leaning Ladder Problem | Torque, FBD, and Force Balance Explained Step-by-Step
Learn how to solve classic ladder problems using static equilibrium principles. This lesson covers torque, free body diagrams, normal and frictional forces, and strategic pivot selection
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How Satellite Energy and Speed Depend on Orbit Radius
Explore how a satellite’s kinetic and potential energy change as it orbits Earth—yet its total mechanical energy stays constant. Learn why speed depends solely on orbital radius, why mass doesn’t matter, and how all this ties into...
Curated Video
Gravitational Acceleration and Free Fall Acceleration (How they differ)
Discover how gravitational acceleration is calculated near Earth and why your weight changes with altitude, latitude, and Earth’s rotation. This lesson unpacks the physics behind g = a₉ − ω²R and shows how gravity subtly varies across...
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Gravitational Superposition Principle Made Simple | Force from Multiple Masses & Extended Bodies Explained
Learn how to calculate gravitational force on a particle due to multiple masses using the principle of superposition. This lesson breaks down vector addition, force from extended bodies using integrals, and how to apply Newton’s law of...
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How to Use Spanish Feminine Nouns & "La"
Howcast - Learn how to use feminine nouns and how to use "la" from Spanish teacher Andrea Cukier in this Howcast video.
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How to Tell Someone They’re a Bad Kisser
Howcast - Learn how to tell someone they're a bad kisser from kissing expert Shallon Lester in this Howcast video.
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How to Solve an Algebraic Equation
Howcast - An algebraic equation is an equation that includes one or more variables. These equations can be solved as long as the number of variables does not exceed the number of equations.
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How to Isolate a Variable
Isolating a variable is a matter of separating and simplifying.
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Calculate the number of equal groups in a division story
Pupil outcome: I can calculate the number of equal groups in a division story. Key learning points: - Skip counting can be used to calculate the number of equal groups in a division story. - We say 50 divided into groups of 10 is equal...
Curated Video
Represent multiples of ten in an expression or an equation
Pupil outcome: I can represent multiples of ten in a calculation. Key learning points: - Multiples of ten can be represented with addition of tens. - 10 + 10 + 10 is equal to three tens which is equal to 30 - An expression shows the...