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Instructional Video4:27
Khan Academy

Order of Operations

For Students 6th - 9th
Please Excuse My Dear Aunt Sally - or whichever mnemonic your students use for the order of operations - is the focus of this video. Sal takes viewers through various mathematical equations which require the use of the order of...
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Instructional Video4:11
MinutePhysics

The Order of Operations is Wrong

For Students 7th - 12th Standards
PEMDAS is not all that it is cracked up to be. The short video provides an argument that the order of operations may not be instructionally sound. The presentation shows that understanding the concepts and properties of mathematics...
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Instructional Video3:44
Curated OER

How Do You Solve a Multi-Step Equation Using Reverse Order of Operations?

For Students 6th - 12th
Solve an equation that has both variables and fractions. Use the rules of equality to add, subtract, multiply, and divide to isolate the variable and find your answer. Don't forget to plug your answer into the original problem to verify.
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Instructional Video2:47
Curated OER

How Do You Solve a Two-Step Equation with Fractions Using Reverse Order of Operations and Reciprocals?

For Teachers 6th - 9th
In order to solve any equation, one must isolate the variable. The teacher demonstrates how to solve this multi-step equation first by using the addition property of equality and then multiplying by the reciprocal of the fraction...
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Instructional Video
National Education Association

Evaluating Expressions Without Radicals

For Students 7th - 9th Standards
Evaluating expressions require two things- parentheses and PEMDAS. The video starts with an emphasis on using parentheses to plug in your variables. Once you have everything plugged in, PEMDAS will get your mathematicians to the correct...
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Instructional Video4:31
Curated OER

What Are Numerical and Algebraic Expressions?

For Teachers 6th - 9th
Numerical expressions contain numbers and mathematical operations. In addition to numerical expressions, algebraic expressions contain not only numbers but also variable(s). Watch this video as the instructor illustrates several examples...
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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.
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Instructional Video11:26
Teaching Channel

Algebra Skills: Support at Every Step

For Teachers 9th - 12th Standards
"My biggest challenge in class is to get some students to put a pen to paper, because they don't want to make a mistake." Discover how two teachers are working to help special education students develop the skills they will need in an...
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Instructional Video3:33
Curated OER

How Do You Solve a Two-Step Equation by Multiplying by a Reciprocal?

For Teachers 6th - 9th
Love those fractions?!? This lesson involves using the multiplication property of equality to eliminate the fraction in the given equation. In this equation, (2/3)( x-4)=4, the reciprocal of the fraction is used to eliminate it. The...
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Instructional Video3:11
Curated OER

How Do You Solve a Word Problem Using a Multi-Step Inequality?

For Teachers 6th - 9th
This real-world word problem seems pretty complicated, but it's really not. It only takes four steps once you have an original expression to solve this problem. There are some negative numbers involved in this inequality. So don't forget...
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Instructional Video2:57
Curated OER

How Do You Solve a Two-Step Equation by Multiplying by a Reciprocal?

For Teachers 8th - 11th
Got a fraction in your equation? Don't like that fraction? Just multiply both sides by the reciprocal of that fraction to get rid of it. Now you can solve the problem using the steps necessary to isolate your variable. Don't forget to...
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Instructional Video4:42
Virtual Nerd

How Do You Solve a Radical Equation?

For Students 6th - 12th
Oh my, there's a variable inside the radical . How will you ever solve this one? The teacher explains step-by-step just how to solve this radical equation. She also shows how to check to make sure the answer is the correct one.
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Instructional Video4:31
Curated OER

How Do You Solve a Word Problem by Writing an Equation and Plugging in Values?

For Teachers 6th - 9th
There are a lot of moving parts in this word problem. There are three variables, and then there's writing out an equation. Oh my! The best thing to do is watch this video and take some good notes as the teacher explains each and every...
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Instructional Video11:32
Anywhere Math

Writing Expressions

For Students 6th - 9th Standards
Products, quotients, sums, and differences are the operations to know. A thorough lesson presentation explains how to analyze a verbal expression to create a mathematical expression. Explanations of terminology and order help learners...
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Instructional Video9:33
Mathispower4u

Evaluating Algebraic Expression (L1.3)

For Students 6th - 9th Standards
You'll definitely find value in a helpful video. Young mathematicians watch a YouTube video to learn about evaluating algebraic expressions for given values. The video goes through several examples, including both mathematical and...
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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...
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Instructional Video2:44
Curated OER

How Do You Solve an Inequality by Multiplying by a Positive Number?

For Teachers 6th - 12th
Instruct your pupils on solving inequalities by multiplying by positive numbers with this video. The video presents how to do just this in step-by-step fashion. A straightforward video, this could be used to supplement your lesson during...
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Instructional Video2:02
Curated OER

How Do You Solve an Inequality by Multiplying by a Positive Number?

For Teachers 6th - 9th
Instruct your pupils on solving inequalities by multiplying by positive numbers with this video. The video presents how to do just this in step-by-step fashion. A straightforward video, this could be used to supplement your lesson during...
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Instructional Video5:42
Curated OER

How Do You Solve a Decimal Inequality Using Division?

For Teachers 6th - 12th
Divide decimals to solve this inequality! Learners can watch the instructor in this thorough video as she works through an inequality that contains decimals. This resource is appropriate for teaching, reinforcing, or reviewing the concept.
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Instructional Video4:07
Curated OER

How Do You Add Complex Numbers by Graphing in the Complex Plane?

For Teachers 10th - 11th
Graphs usually add an extra dimension to ones understanding of mathematical concepts and graphing complex numbers is no exception. This video shows to graph complex numbers on the complex plane and what the results of adding complex...
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Instructional Video5:07
Curated OER

How Do You Solve a Decimal Inequality Using Division?

For Teachers 6th - 9th
Divide decimals to solve this inequality! Learners can watch the instructor in this thorough video as she works through an inequality that contains decimals. This resource is appropriate for teaching, reinforcing, or reviewing the concept.
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Instructional Video2:33
Curated OER

How Do You Add and Subtract a Bunch of Numbers with Different Signs?

For Teachers 6th - 12th
So you have an expression of positive and negative numbers and you want to add and subtract them. Do you do the operations in order that they are written? Do you combine some? Do you move them around? Do you change their signs? The...
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Instructional Video9:52
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3Blue1Brown

Vectors, What Even Are They? | Essence of Linear Algebra, Chapter 1

For Students 11th - Higher Ed Standards
Take a look at vectors as geometric objects and then as an algebraic concept. The second video in a series of 15 introduces the vector using three perspectives: the physics, computer science, and mathematical. The resource shows the...
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Instructional Video7:52
Mathispower4u

Evaluating Algebraic Expressions

For Students 6th - 9th Standards
What types of mistakes do your classes make when evaluating algebraic expressions? A direct video lesson explains the process of evaluating algebraic expressions by substituting values for multiple variables. The instructor highlights...