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Bailout 3: Book Value vs. market value
The "housing bubble" is addressed in this video, as well as the discrepancy between a stock's market value and its book value. Students will learn about the intricacies of the stock market as well as an introduction to the housing market...
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Bailout 9: Paulson's Plan
Equally informative and opinionated, this video is sure to inspire thoughtful discussions and debate among your students. Sal outlines Paulson's plan - and explains his own (unfavorable) opinion about it.
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Subtracting Mixed Numbers 2
In order to subtract mixed numbers, sometimes one may need to determine the least common multiple in order to find a common denominator. This is just what Sal does in this presentation. First, he shows how to find a common denominator...
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Place Value 2
Viewing this Khan Academy video helps with grasping the concept of Place Value. Learners write the word six hundred forty-five million, five hundred eight-four thousand, four hundred sixty-two in standard form, using multiplication as a...
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Recognizing Divisibility
The divisibility rules are invaluable tools to possess. Sal teaches students to recognize divisibility using the divisibility rules. He explains why 380 is divisible by some numbers and not by others. Tip: Create a handout on the...
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Finding Factors of a Number
If your class has watched the Khan Academy video on recognizing divisibility, they will have a good foundation for this video on finding factors. Sal demonstrates how to find factors of a number by using the divisibility rules and...
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Adding Fractions with Unlike Denominators
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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Number Sets
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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Simply a polynomial
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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Estimation with Decimals
Estimation is a good way to build and assess a student's number sense. Watch as Sal uses estimation to solve a problem where he must determine how much 'Janelle' ran during a 4-day period. He calculates the exact amount and compares the...
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Square a Binomial
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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U.S. Customary and Metric units
Expose your students to the differences and vocabulary associated with both U.S. Customary Units and Metric Units. Sal defines 14 different terms of measure and then sorts them into two categories. He has lots of little side notes that...
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Dividing Whole Numbers and Applications 1
Sal takes this word problem apart piece by piece to demonstrate how to divide 18 by 2. He underlines important information, determines what he needs to do to solve the problem, and then writes 18/2, three different ways. This resource is...
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Multiplying Binomials
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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Identity Property of 1
Part of building solid number sense is understanding the laws and properties of multiplication and addition. Elementary school students can watch Sal multiply using the number 1. He explains that 1x any number equals that number. He...
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Changing an Improper Fraction to a Mixed Number
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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Understanding Square Roots
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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Multiplying Whole Numbers and Applications 4
Are your students learning about solving word problems involving multiplication? If they are, then this video could be a perfect complement to your lesson. Sal shows students how to use rounding to estimate the product of a double-digit...
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Comparing Celsius and Fahrenheit temperature scales
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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Dividing Decimals 2.1
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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Multiplying Monomials by Polynomials
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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Dividing polynomials 1
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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Converting Fahrenheit to Celsius
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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Adding Polynomials
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.