Basic Algebra : How to Teach the Multiplication of Signed Numbers
Multiplication of signed numbers in mathematics is taught by explaining that a positive number multiplied by itself equals a positive number. Learn ways to explain how to multiply a negative number and a positive number with help from a math teacher in this video on mathematics.
Expert: Jimmy Chang
Bio: Jimmy Chang has been a math teacher at St. Pete College for nearly a decade. He has a master's degree in math, and his specialties include calculus, algebra, liberal arts, mat
Solving Rational Equations, Part 2 of 3
The instructor in this video (04:08) discusses how to solve rational equations using another problem. Sl Khan shows how to multiply to remove the fractions to make solving easier. He uses computer software for demonstration. The viewer may want to open the video to 'full screen' because the instructor has a lot of small writing on a black screen.
Solving Rational Equations with Unlike Denominators
This video clip explains how to solve rational equations with unlike denominators. The first step is to factor the denominators and look for a common denominator. Next, we multiply both sides of the equation by the common denominator to clear the fractions. Finally, we solve for the variable using an appropriate technique. (1:35)
Proportions and Similar Figures
Can you use the lengths of the sides of one figure to discover a missing length for a similar figure? Watch this video and find out. This video by Duane Habecker is part of the video collection at NextVista.org (http://nextvista.org), a proud partner of Curriki.
Similar Triangles, Part 2 - Khan Academy
Video uses an electronic black board with different-colored pens. In this video. Mr. Khan discusses the measurement of alternate interior angles, corresponding angles and how they are similar. Triangles are drawn in two parallel lines and a transversal. Narrator shows how to figure out the length of the sides of the angles when three sides are known. Good quality video. Good for middle elementary and middle school students.
Introduction to similar triangles. The instructor uses his computer (appears to be the Paint program) to communicate with the viewer. He uses different colors to aid in comprehension. For middle school students and older.
This video explains how isosceles triangles have at least two congruent sides and at least two congruent angles. The congruent sides, called legs, form the vertex angle. The other two congruent angles are the base angles. Isosceles triangles are used in the regular polygon area formula and isosceles right triangles are known as 45-45-90 triangles. (1:24)
Isosceles Triangle Properties
In isosceles (and equilateral) triangles, a segment drawn from the vertex angle to the opposite side is the altitude, angle bisector and median. This video explains how isosceles triangle properties are used in many proofs and problems where the student must realize that, for example, an altitude is also a median or an angle bisector to find a missing side or angle. (1:03)
In this short video, the instructor defines and shows an example of an equilateral triangle. This lesson is very brief.
How to Find the Perimeter of a Triangle
This is a very brief tutorial that focuses on solving the perimeter of a triangle. The teacher uses a small whiteboard for instruction. (01:51)
Learn About Domestic Animals
This simple animation (with the help of a talking elephant that drives) introduces young learners to animals that live on farms and in homes.
ABC Phonics Song
This video shows letters and the sounds they make. Letters are shown in alphabetical order. (2:02)
Basic Math: Lesson 2 - Equalities & Inequalities
This lesson consists of providing you with a Self-Tutorial on the basics of equalities and inequalities. I go over how to write results in interval notation, inequality notation, and set (set-builder) notation. I also explain in the printed notes how to use your graphing calculator to help you make comparisons between numbers.
Solving Compound Inequalities
This lesson demonstrates how to solve a compound inequality then shows how to graph the inequality. The instructor goes through how to do this step by step on a white board. Then, he shows the solution set on a number line.
If we want to solve for or describe a region in a coordinate plane, we can use linear inequalities. Linear inequalities give us a set of solutions as opposed to just one solution. This video clip explains how to solve linear inequalities using similar methods as in solving multi-step equations, except that there are extra rules when using multiplication and division. We graph linear inequalities by shading regions of number lines or coordinate planes. (6:20)
Solving and Graphing Inequalities
Inequalities are useful for finding a range of solutions. Solving and graphing inequalities is a key to finding and showing that range. This video clip explains how to solve inequalities using a lot of the same methods as those in solving multi-step equations when dealing with additive inverses, although some things are different when solving inequalities using multiplication. We graph inequalities using number lines. (1:32)
Graphing Systems of Inequalities, Part 2
The instructor in this video, Sal Khan, in an easy, conversational tone, continues to discuss how to graph inequalities. Mr. Khan uses the Paint Program (with different colors) to illustrate his points. Sal Khan is the recipient of the 2009 Microsoft Tech Award in Education. The student or educator may want to open the video to 'full screen' as the instructor is using a black background and the writing is small.
This video is a photostory about the Olympians, an elite group of Greek gods and goddesses. It is set to music as a variety of representations of the Olympians are shown on the screen, while text tells us the name of each of these Gods.
Class of the Titans - Episode 50 - "Golden Boy" - Part 1
Neil's growing arrogance and good fortune draws out the goddess Nemesis, who decides our Golden Boy needs to be taught a lesson. She curses him with the Midas Touch and now everything he touches then turns to gold. Meanwhile, Jay and the others are drawing Cronus into a trap. Just as they are about to spring it, Neil messes things up... big time... by turning his friends into golden statues! A great animated video that
Class of the Titans - Episode 50 - "Golden Boy" - Part 2