Howard Hughes Medical Institute
Daly's Model of Subduction
The subduction model: helping learners understand how continental drift is possible. An animation demonstration illustrates the process of subduction through an analysis of the earth's layers. The instructor narrates the process as the...
Howard Hughes Medical Institute
Holmes' Model of Convection
Convection currents do more than just bake a cake. A quick lesson demonstrates the convection currents of the earth and how they contribute to continental drift. An animation illustrates the movement of the currents and demonstrates how...
Howard Hughes Medical Institute
Plate Tectonics
The plates of the earth may be shifting right under your feet! Learn the causes and consequence of this shifting through an informative a video lesson. Scholars explore the effects of the movement on a local, global, and even planetary...
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Solving an Equation with One Set of Parentheses
Time to distribute some learning! The video lesson teaches how to solve an equation by applying the distributive property. Learners watch as the instructor completes each step, explaining as he goes. The first step to solving uses the...
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Solve an Equation with Variable on Both Sides
Solving equations is the groundwork for all of algebra. A video presentation explains the steps for solving an equation with variables on both sides. Using a different color for each step, the instructor shows how to manipulate the...
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Solve a Linear Equation With Decimals and Variables on Both Sides (Example)
Create better equation solvers! The video presentation tackles solving an equation with variables on both sides with decimal coefficients. The instructor explains how to multiply by a constant to eliminate the decimals before continuing...
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Solving Multiple Step Equations
Not only can equations have many steps to solve, but those steps can look very different from equation to equation. The narrator of the video lesson explains the steps to solving six different multi-step equations. He provides...
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Writing Variable Expressions (Examples)
Variables are the name of the game. The video instructor explains the importance of defining a variable and then models how to write an expression. He reviews three different problem scenarios and then builds expressions to model each...
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Write Algebraic Expressions (Example)
Expressing words as numbers and symbols ... that is the task at hand. Given a contextual situation, it is often necessary to rewrite the information as expressions. The video demonstration shows two examples of this concept and gives...
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Write Algebraic Expressions from Statements: Form ax+b and a(x+b)
Write an expression from an expression, verbal to algebraic. A quick video lesson gives pointers on how to write algebraic expressions from words. Stressing important vocabulary and order of the expression help to develop an...
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Write Basic Expressions from Words Modeling Situations
Writing expressions is a basic skill of algebra—but it's a skill that causes scholars to struggle. A thorough video provides examples and explanations to help individuals understand the process. From defining the variable to representing...
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Writing Basic Algebraic Expressions (Example 1)
Turning words into symbols, a powerful application of mathematics. A video lesson explains how to rewrite a problem-solving question with expressions. The instructor emphasizes the need to define variables.
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Write Expressions and Determine the Measure of Complementary Angles (Example)
Investigate algebraic applications of complementary angles. Young scholars watch as the instructor describes and defines complementary angles. He then shows an example of finding an unknown value of x given expressions for a pair of...
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Write Expressions for Complementary Angles and Supplementary Angles (Basic) (Example)
A straightforward lesson explains the meaning of complementary and supplementary angles. The instructor uses both an algebraic representation and a numeric example to describe each angle pair.
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Writing Expressions to Solve a Linear Equation App: Stamps
Learners build skills for writing and solving equations with a video that describes the process for writing expressions and then an equation to solve a problem. The problem asks for the number of nickels and dimes needed given a set of...
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Evaluate An Expression Using The Order of Operation (Example 2)
What comes first, the exponents or the multiplication? Follow the order of operations and you will never make a mistake! Young scholars learn the order of operations and then watch as the instructor evaluates a five-step problem. The...
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Translating Statements to Algebraic Expressions (Applications)
Math is like another language with a vocabulary all its own. Translating verbal statements to mathematic symbols is a challenging task for learners. The video instruction provides several examples viewers watch—and rewatch—to improve...
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Write a Numerical Expression in the Form a-b and a(b+c) (Example)
To add or subtract ... how do you make the decision? The video instructor explains the process of writing a numerical expression from a verbal expression. While writing the expressions, he provides explanations for his decisions.
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Writing Algebraic Expressions (Examples)
Express yourself! Using a table method, the lesson presentation explains how to convert a verbal expression into an algebraic expression. The examples include problems with a variety of operations.
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Writing Algebraic Expressions
Turning words into symbols is a powerful way to use mathematics. A direct video lesson presents several word problems requiring an algebraic expression. After defining the variable, the presenter shows how to write an expression...
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Introduction to Variables and Variable Expressions
Variable expressions can take many shapes and forms. Learners review the different components of many different variable expressions in a straightforward video lesson. After introducing vocabulary, the instructor uses context to write...
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Evaluate An Expression Using The Order of Operations (Example 3)
Multiply, add, exponents, parentheses ... what do I do first!?! Young mathematicians watch as the video instructor works through a problem that includes all steps of the order of operations. Explanations help learners understand how...
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Evaluate An Expression Using The Order of Operations (Example 1)
Introduce your classes to order of operations with a simple example. Showing how to apply the order of operations, the lesson presenter evaluates a two-step expression. Learners see how the order of operations affects the sequence of...
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Evaluate Exponential Expressions (Example)
Exponents create the incredibly growing expression. A video instructor explains the expanding properties of the exponential expression. Expanding the expression helps pupils see how to simplify and evaluate.