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8,137 reviewed resources

2:58
Lesson Planet

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.
2:10
Lesson Planet

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.
2:42
Lesson Planet

Evaluating Exponential Expressions

For Students 6th - 8th Standards
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.
2:47
Lesson Planet

Identifying Fraction Parts

For Students 3rd - 5th
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.
2:30
Lesson Planet

Special Polynomials Products 1

For Students 8th - 10th
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.
4:09
Lesson Planet

Prime Factorization

For Students 5th - 7th
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.
2:42
Lesson Planet

Decimals and Fractions

For Students 4th - 6th
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.
2:36
Lesson Planet

Terms coefficients and exponents in a polynomial

For Students 7th - 9th
Use this video to build mathematical vocabulary through practical application. Sal breaks down the parts of a polynomial expression, identifying the coefficient and exponents while he defines them.
2:31
Lesson Planet

Finding Unit Rates

For Students 5th - 7th Standards
Watch this video to see how Sal solves a word problem where he must determine how many newspapers are delivered each hour. This is a great word problem involving unit rate, ratios, and division.
3:22
Lesson Planet

Adding fractions with different signs

For Students 5th - 7th
Have your students solve this word problem along with Sal. He adds mixed numbers to solve the problem and shows what to do if the mixed numbers have uncommon denominators.
0:56
Lesson Planet

Dividing Monomials

For Students 8th - 10th
Here is a quick look at how one could simplify a monomial expression involving division. Sal works a problem and briefly explains his process. Great as a concept review.
5:13
Lesson Planet

Compound Inequalities 2

For Students 7th - 9th
Practice solving compound inequalities by isolating an unknown variable. This is the second video in a series of four focused on solving compound inequalities.
6:51
Lesson Planet

CAHSEE Practice: Problems 35-37

For Students 8th - 10th
A few geometric problems test your students' knowledge of area and volume in questions 35-37 of the practice CAHSEE. Sal goes through the strategies and hints for solving the problems with helpful narration and colorful annotation, which...
5:43
Lesson Planet

CAHSEE Practice: Problems 17-19

For Students 8th - 10th
Taking students through problems 17-19 in this practice CAHSEE, the speaker illustrates how to solve problems involving reading data from tables, probability, and scatterplots. The speaker models careful question-reading and the...
4:39
Lesson Planet

CAHSEE Practice: Problems 13-14

For Students 8th - 10th
Probability and pie charts are the topics of problems 13-14 in this practice CAHSEE video, in which the speaker takes test review students through the work necessary to solve these problems. A teacher could present the video to a class...
1:49
Lesson Planet

CAHSEE Practice: Problems 52-53

For Students 8th - 10th
In the final two problems of the CAHSEE practice test, students are guided through algebraic equations involving factoring and reciprocals. This is a great resource for students who become confused by multiple choice questions, or who...