Instructional Video7:41
Khan Academy

Exponential Growth Functions, Exponential and Logarithmic Functions, Algebra II

7th - 11th
Sal solves several problems involving exponential growth functions for two reasons. First, he aims to familiarize viewers with the process, particularly for those who find exponents challenging or daunting. Second, Sal wants to show how...
Instructional Video7:40
Khan Academy

Addition of Rational Numbers

7th - 11th
Are your pupils having problems with fractions in algebra problems? Have no fear; Sal is here! Sal takes care to guide them through the intricacies of fractions within an algebraic context, and his explanation of word problems will have...
Instructional Video7:38
Khan Academy

SAT Prep: Test 3 Section 8 Part 4

9th - 12th
Fans of algebra, geometry, and hamsters will enjoy this video, which finishes this practice test with problems 15-16. Sal carefully, methodically, and efficiently takes students through the necessary steps for solving increasingly...
Instructional Video7:36
Khan Academy

SAT Prep: Test 1 Section 9 Part 4

9th - 12th
Sal tackles problems 12-14 of the practice SAT, which deal with linear equations (with negative numbers and radicals). Demonstrating more than one way to solve the problems, Sal takes care to note the most efficient ways to still arrive...
Instructional Video7:28
Khan Academy

SAT Prep: Test 1 Section 3 Part 7

9th - 12th
Not only solving the problems but deciphering the methods behind them, this video assists students with test-taking strategies, such as solving for x in algebraic equations quickly, efficiently, and correctly. Problems 17-18 on page 399...
Instructional Video7:21
Khan Academy

Exponential Growth and Decay Word Problems, Algebra II |

7th - 11th
Concepts from the last few videos, particularly exponential growth and decay functions, are covered in this video about word problems. Viewers can apply their new (or growing) algebraic knowledge to solve the word problems along with Sal.
Instructional Video7:12
Khan Academy

SAT Prep: Test 8 Section 8 Part 3

9th - 12th
The final video of the SAT practice series takes students through increasingly complicated algebra and geometry problems, but Sal works steadily through each mathematical process. At the end of the video he tells students that they are...
Instructional Video5:58
Khan Academy

Stem-and-Leaf Plots, Applying Mathematical Reasoning, Pre-Algebra

7th - 11th
Sal helps with data organization in this video, which focuses on stem and leaf plots. Clarifying that "this is just one of many, many, many ways to visualize data that you will run into in your mathematical or statistical futures," he...
Instructional Video6:50
Khan Academy

Coordinate Plane Examples, Linear Equations and Functions

7th - 11th
Sal's goal in this video is to "familiarize ourselves with the x, y-coordinate plane." If your pupils have blank expressions when you present them with graphing problems, this video will be a great help to clear up the basics.
Instructional Video5:29
Khan Academy

SAT Prep: Test 2 Section 6 Part 6

9th - 12th
The most valuable part of this video isn't math-related (even though the math strategies are quite helpful); it's the way Sal replaces part of a problem that confuses him with easy-to-manipulate variable letters. Students who get hung up...
Instructional Video6:41
Khan Academy

Midpoint Formula, Analytic Geometry, Geometry

8th - 11th
The midpoint formula - which Sal maintains is "silly to memorize" since you simply average - is the focus of this video. Viewers will appreciate the seamless transition between algebraic and geometric concepts in this lecture.
Instructional Video6:08
Khan Academy

Histograms, Applying Mathematical Reasoning, Pre-Algebra

7th - 11th
Another way to organize data beyond the stem and leaf plot - the histogram - is the focus of this lesson. Sal's objective is to introduce viewers to these methods of organization, making them familiar and straightforward, so students can...
Instructional Video6:00
Khan Academy

SAT Prep: Test 6 Section 9 Part 4

9th - 12th
Putting the finishing touches on this practice session, Sal takes students through an algebra problem involving percentages (or decimals, as he prefers) and a geometry problem with equilateral rectangles. Students who need a little more...
Instructional Video5:44
Khan Academy

SAT Prep: Test 1 Section 9 Part 5

9th - 12th
Finishing up this practice test, Sal shows how to complete the graphing and linear equations in problems 13-14. Students will rest assured after seeing him deftly navigate the ins and outs of these diagrams, making the SAT seem less...
Instructional Video5:30
Khan Academy

SAT Prep: Test 6 Section 7 Part 6

9th - 12th
Sal has a good time solving problem 20 on page 738, allowing students to look past the "trickiness" of SAT problems and, possibly, to enjoy solving the problem. He takes them through each step of the problem, taking care to point out the...
Instructional Video3:11
Khan Academy

Solving Radical Equations, Exponent Expressions and Equations, Algebra I

7th - 11th
Continue your lecture on radical equations with this video, which features Sal solving a few more problems with his classic clarity and understandable way. Young mathematicians will benefit immensely from seeing his cool hand guide the...
Instructional Video5:06
Khan Academy

SAT Prep: Test 5 Section 3 Part 6

9th - 12th
A potentially scary equation ends this practice session. However, it is no match for Sal's mathematical prowess. And once they watch him make the complicated methodology simple, your students will feel more confident in their own...
Instructional Video4:38
Khan Academy

Negative Exponent Intuition, Pre-Algebra

7th - 9th
"Demystifying" an often mysterious problem, Sal demonstrates some tricks for considering exponents intuitively, rather than working them out each time. He first takes viewers through positive exponents and works up to negative exponents,...
Instructional Video4:27
Khan Academy

Order of Operations Example, Arithmetic Properties, Pre-Algebra

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 that require the use of the order of...
Instructional Video4:02
Khan Academy

SAT Prep: Test 7 Section 5 Part 5

9th - 12th
Sal completes problem 20 from this session of the practice SAT (page 796). He draws the parallelogram necessary for solving the problem, and spends a good amount of time explaining the process and method behind the answer. This video is...
Instructional Video9:59
Khan Academy

SAT Prep: Test 2 Section 3 Part 4

9th - 12th
SAT test-takers get to review median numbers, perimeters, right angles, slopes, and prime factorization in this video, which focuses on problems 13-16. Sal's even pace and methodical problem solving will bolster the confidence of even...
Instructional Video3:06
Khan Academy

E2 E1 Sn2 Sn1 Reactions Example 2

10th - Higher Ed
Sal looks at the same situation as in the previous video, but changes the base, or nucleophile. After changing to a more bulky molecule, Sal explains why the nucleophilic behavior is not as strong.
Instructional Video5:02
Khan Academy

Example 1: Factoring Trinomials with a Common Factor, Algebra II

9th - 11th
Use division and factoring to determine the leading one coefficient. This presentation thoroughly explains how to factor a trinomial to determine its common factors.
Instructional Video3:58
Khan Academy

Graphing Using X and Y Intercepts, Graphing Lines and Slope, Algebra Basics

9th - 11th
After defining intercept, Sal solves a simple equation to identify each intercept and then plots the line on a graph. This video would quite nicely complement an introductory lesson on graphing.