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4:06
Lesson Planet: Curated OER

Adding Fractions with Unlike Denominators

For Students 5th - 7th
Your young mathematicians can solve this problem along with Sal. They will add 4/9 and 11/12 by finding a number that goes into 9 and 12 evenly. Sal fully explains the process of finding a common denominator in a very clear and...
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5:17
Lesson Planet: Curated OER

Number Sets

For Students 5th - 7th
Knowing mathematic terminology is vital for building a functional academic vocabulary. In this video, Sal defines number sets and the terms; natural numbers, whole numbers, integers, rational numbers, irrational numbers, and real...
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3:37
Lesson Planet: Curated OER

Simply a polynomial

For Students 7th - 9th
At times, polynomial expressions can be very long. Watch this video to see how Sal simplifies them by combining like terms. He explains his process and uses various colors to demonstrate why like terms are alike and why they can be...
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2:08
Lesson Planet: Curated OER

Dividing whole numbers and fractions: t-shirts

For Students 5th - 7th Standards
There is no better way to present a math problem than within the context of a story. Sal explains how he divides a fraction to solve a word problem where he must determine how many shirts can be made with 48 yards of fabric. Problems...
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3:38
Lesson Planet: Curated OER

Square a Binomial

For Students 8th - 10th
Sal clearly demonstrates what not do when simplifying a squared binomial. Next, he clarifies why they can't square each term individually and then add them. He uses his incorrect example as a starting point to correctly demonstrate how...
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5:47
Lesson Planet: Curated OER

Multiplying Binomials

For Students 8th - 10th
There are very specific ways to multiply binomials. One could use the FOIL method or employ the distributive property. Sal walks through each step of the FOIL method and then shows that using distribution results in the same answer. This...
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4:02
Lesson Planet: Curated OER

Changing an Improper Fraction to a Mixed Number

For Students 5th - 7th
This video on changing improper fractions to mixed numbers would nicely compliment the Khan Academy video on writing mixed numbers as improper fractions. Sal first shows students how to convert improper fractions. Then, he uses drawings...
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1:21
Lesson Planet: Curated OER

Understanding Square Roots

For Students 5th - 7th
What is the square root of 100? Sal explains what the square root of 100 is, but he needs a little help explaining why. Note: This concept can be challenging for some. If you are showing this video to your class, it does not stand alone....
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2:30
Lesson Planet: Curated OER

Comparing Fractions

For Students 5th - 7th Standards
In this video, Sal determines if 30/45 and 54/81 are equivalent fractions. He explains that he looks at each numerator and denominator as 2 numbers multiplied together. Then he simplifies both fractions to arrive at the conclusion; that...
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5:48
Lesson Planet: Curated OER

Find and Unknown in a Proportion 2

For Students 6th - 8th Standards
Find an unknown in a proportion part 2. This video elaborates on the basic concept of finding an unknown by analyzing a word problem and then applying one of the techniques seen in the previous video. Tip: Use this word problem as a warm...
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2:50
Lesson Planet: Curated OER

Comparing Celsius and Fahrenheit temperature scales

For Students 5th - 7th
What exactly is the difference between Celsius and Fahrenheit? Watch this video to find out. Sal identifies and defines the Celsius and Fahrenheit scales, assesses the differences, and then labels boiling and freezing on each of the...
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1:51
Lesson Planet: Curated OER

Dividing Decimals 2.1

For Students 5th - 7th
Occasionally, in mathematics, there are "short cuts" one can take. Sal explains a quick way to divide decimals numbers. He demonstrates that in certain cases, simply shifting the decimal point to the left will result in a correct answer.
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2:43
Lesson Planet: Curated OER

Multiplying Monomials by Polynomials

For Students 7th - 9th
Can you multiply a monomial by a polynomial? Yes you can, if you use the distributive property. Sal describes how to distribute the monomial term over the entire polynomial expression. He does a wonderful job explaining this concept.
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3:20
Lesson Planet: Curated OER

Dividing polynomials 1

For Students 9th - 11th
Divide two polynomial expressions by writing the problem as a fraction or as long division. Sal shows how to use long division to divide polynomials. A solid understanding of polynomial operations is necessary to grasp this video.
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2:58
Lesson Planet: Curated OER

Converting Fahrenheit to Celsius

For Students 6th - 8th
Sal teaches students how to convert a temperature in Fahrenheit to its equivalent temperature in Celsius. He is explicit and very clear, which is good for those needing additional assistance or exposure to a particular topic.
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2:10
Lesson Planet: Curated OER

Adding Polynomials

For Students 7th - 9th
Adding two polynomials begins with simplifying when possible. Sal demonstrates the process he uses to combine like terms and explains why the process works. This video would be great for those who need a quick refresher.