Instructional Video2:00
Khan Academy

How to Evaluate an Expression with Variables, Introduction to Algebra, Algebra I

For Students 5th - 7th Standards
Evaluate the expression 5t + 3. Use the provided variables to determine an answer. Scholars are provided with three different values for t and must evaluate the expression using each value for t. This resource would be appropriate for...
Instructional Video3:39
Curated OER

How Do You Subtract Fractions with Variables?

For Teachers 6th - 12th
Combine fractions that have unlike denominators and a variable. As usual the variable needs to get isolated. Then find the least common denominator so you can combine the fractions. Finally put it all back together.
Instructional Video4:42
Curated OER

How Do You Subtract Two Rational Expressions with Different Denominators?

For Teachers 6th - 12th
Reinforce instruction on the least common denominator and subtracting rational expressions with this tutorial video. Learners can view this video in class or at home. Consider using this resource to supplement your lesson plan.
Instructional Video4:07
Curated OER

How Do You Subtract Two Rational Expressions with Different Denominators?

For Teachers 8th - 11th
Reinforce instruction on the least common denominator and subtracting rational expressions with this tutorial video. Learners can view this video in class or at home. Consider using this resource to supplement your lesson plan.
Instructional Video1:59
Mathispower4u

Evaluate an Expression with a Negative Exponent

For Students 8th - 10th Standards
The same rules apply. While watching the video, learners realize that the same rules apply to evaluate an expression with negative exponents as does simplifying an expression. The presentation shows a set of steps to evaluate a monomial...
Instructional Video3:55
Curated OER

How Do You Add Fractions with Variables?

For Teachers 6th - 12th
Combine fractions that have unlike denominators and a variable. As usual the variable needs to get isolated. Then find the least common denominator so you can combine the fractions. Finally put it all back together.
Instructional Video5:44
Curated OER

How Do You Reduce Common Factors in a Rational Expression?

For Teachers 7th - 9th
Multiply the given algebraic fractions. But first, reduce, reduce, reduce! It is a good rule of thumb to reduce as much as possible before multiplying. So how do you reduce rational expressions? Put the like terms together and cancel the...
Instructional Video3:06
Curated OER

How Do You Evaluate an Expression with Exponents?

For Teachers 7th - 9th
An algebraic expression and a given value for the variable. Use the substitution property of equality to plug in the given value and solve the expression. Be careful and use the order of operations correctly because there is an exponent...
Instructional Video2:21
Curated OER

How Do You Solve an Inequality With Variables on Both Sides?

For Teachers 6th - 9th
A direct instructional video of how to solve an inequality when you have the same variable on both sides of the inequality sign, this resource could be used in class or at home.
Instructional Video3:01
Curated OER

How Do You Solve an Equation with Variables on Both Sides?

For Teachers 6th - 12th
So you have a variable on both sides of the equation. How do you solve this kind of equation? Just get like terms together on each side of the equation and then isolate that variable.
Instructional Video2:57
Curated OER

How Do You Solve an Inequality With Variables on Both Sides?

For Teachers 6th - 12th
A direct instructional video of how to solve an inequality when you have the same variable on both sides of the inequality sign, this resource could be used in class or at home.
Instructional Video2:10
Khan Academy

Example 6: Subtracting Polynomials with Two Variables, Algebra I

For Students 9th - 11th
Sal beautifully explains how to subtract two polynomial expressions with multiple variables. He groups like terms and the distributive property to create a single expression.
Instructional Video3:18
Curated OER

How Do You Add Fractions with Variables?

For Teachers 8th - 9th
Combine fractions that have unlike denominators and a variable. As usual the variable needs to get isolated. Then find the least common denominator so you can combine the fractions. Finally put it all back together.
Instructional Video3:03
Curated OER

How Do You Subtract Fractions with Variables?

For Teachers 7th - 9th
Combining terms that have fraction coefficients means you have to use your prior knowledge of adding and subtracting fractions. Find the least common denominator so you can combine the fractions. Finally put it all back together.
Instructional Video3:01
Curated OER

How Do You Solve a Word Problem Using an Inequality With Variables on Both Sides?

For Teachers 6th - 9th
Don't skip this word problem! Take one piece at a time in writing out this inequality. Once you have an expression that represents the words in this inequality, the rest will seem easy. So watch this video to get a better understanding...
Instructional Video3:12
Curated OER

How Do You Solve an Equation with Variables on Both Sides and Grouping Symbols?

For Teachers 7th - 10th
This equation with a variable on both sides and parentheses on both sides seems like it will be hard to solve. Don't despair! It's not as complicated as you might think. Just use the order of operations and take it one step at a time.
Instructional Video2:30
Khan Academy

Example 5: Adding Polynomials with Two Variables, Algebra I

For Students 9th - 11th
While explaining how to add polynomial expressions with multiple variables, Sal uses academic vocabulary and a straightforward thinking process. This video is relatively short and would be appropriate for students working on homework or...
Instructional Video
National Education Association

Independent and Dependent Variable

For Students 8th - 11th Standards
Introduce learners to independent and dependent variables with an informative video.The two variables are defined via inputs and outputs. It makes clear that the independent variable is the one that the person has control over,...
Instructional Video
National Education Association

Identify Independent Variable and Dependent Variable on Various Representational Modes

For Students 8th - 11th Standards
The representation of a relationship really depends. The difference between dependent and independent variables is the focus of a short video that also includes examples of determining the types of variables. The presenter makes the...
Instructional Video5:44
Curated OER

How Do You Find Missing Angles in a Triangle With Variables?

For Teachers 6th - 12th
Are you working on finding the missing angles in triangles in your class? Consider this video. An instructor uses the triangle sum theorem to create an equation that helps her find the missing angles. She explains each step and writes...
Instructional Video5:09
Curated OER

How Do You Find Missing Angles in a Triangle With Variables?

For Teachers 8th - 10th
Are you working on finding the missing angles of triangles in your class? Consider this video. An instructor uses the triangle sum theorem to create an equation that helps her find the missing angles. She explains each step and writes...
Instructional Video3:38
Khan Academy

Multiplying and Dividing Rational Expressions 1, Algebra II

For Students 8th - 11th
Provide your algebra class with some review of rational expressions in this video. Sal uses several sample problems to show viewers the process, and his explanations are clear and easy to understand.
Instructional Video10:17
Curated OER

How Do You Solve a Rational Equation by LCD Multiplication?

For Teachers 6th - 12th
Use the least common denominator to solve rational equations with variables in the denominators of algebraic fractions. Learners can watch this video to find out how to do just this! An instructor solves 2 problems by finding the least...
Instructional Video4:26
Mathispower4u

Evaluate a Quadratic Expression with a Negative Value (Example)

For Students 8th - 11th
Don't feel negative about quadratic expressions. An instructional video shows viewers how to evaluate a quadratic expression when the variable has a negative value. It presents two examples for the topic and works through these examples...