####
Now... gain access to over
**2 Million**
curated educational videos and
**500,000**
educator reviews to free & open educational resources

### We found 8,179 reviewed resources

Lesson Planet

#### Find and Unknown in a Proportion 2

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...

Lesson Planet

#### 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...

Lesson Planet

#### Changing a Mixed Number to an Improper Fraction

The method of converting a mixed number to an improper fraction is fully explained in this video. Sal completely details how and why one is able to convert a mixed number. He uses multiple colors and drawings to demonstrate the...

Lesson Planet

#### 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...

Lesson Planet

#### Dividing Fractions

Here is an example problem that requires Sal to divide by the reciprocal. He demonstrates the process of dividing the fraction and rewriting it as a mixed number. Sal nicely explains why multiplying a fraction is the same as dividing it...

Lesson Planet

#### 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.

Lesson Planet

#### 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.

Lesson Planet

#### Rounding Whole Numbers 3

Sal Khan completes the 3-part rounding series with this Khan Academy video on rounding to the nearest 10. He references the actions taken in video 2, so students would be best served if all three videos where shown in sequence.

Lesson Planet

#### Rounding Whole Numbers 1

Rounding is an important skill which must be used throughout the study of mathematics. This Khan Academy video is the first in a series of 3. It shows how to round the number 24,259 to the nearest hundred, using a number line.

Lesson Planet

#### 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.

Lesson Planet

#### 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.

Lesson Planet

#### Evaluating Exponential Expressions

Here is the first video in a three-part series on evaluating exponential expressions. Sal Khan evaluates an exponential expression, reminding students to use PEMDAS while he demonstrates and explains his algebraic reasoning.

Lesson Planet

#### Identifying Fraction Parts

Students observe Sal identify parts of a fraction. He draws a pentagon and 'cuts' it into 5 equal slices. Next, he removes 2 'slices' and writes the remaining portion as a fraction, explaining what each part represents.

Lesson Planet

#### Special Polynomials Products 1

Some polynomials, when multiplied, result in a special product. Sal uses the distributive property to demonstrate the multiplication process. He then explains why some polynomials cannot be completely simplified.

Lesson Planet

#### Prime Factorization

Older elementary students will appreciate how clearly Sal explains how to find the prime factorization of 75. He shows the complete process, taking note of numbers that are, and are not primes, and why.

Lesson Planet

#### Decimals and Fractions

This video demonstrates how to write a decimal as a fraction and explains why it works. The concept is explained well and presented in a clear and straight forward way. Great for 3rd or 4th graders.