Starting with the distinctions between Ketones and Aldehydes, Sal diagrams the groups that affect the naming.

The instructor demonstrates how to combine like terms as the first step in solving multi-step equations. She applies the rules of combining positive and negative numbers. Then she shows clear steps in solving the equation to find the...

The instructor demonstrates that when you add the opposite value of a given number to that number you will always get zero. Then she shows how multiplying by the inverse of any number except zero will equal 1.

Is it true that any number multiplied by zero is zero? Is it true that any nonzero number multiplied by -1 is the opposite sign of the number being multiplied? Watch this video and listen to the instructor as she demonstrates how these...

Kids love making animal sounds, and they love Elmo! Dorothy the fish and Elmo talk to several children about wild animals. Each child tells Dorothy about a wild animal and then shows her what that animal does. They depict a lion, an...

No negative variables allowed! The instructor demonstrates how to apply the multiplication property of -1 to solve a multi-step equation that has a negative variable.

Fractions!?! Learn how to solve an equation that has a fraction in it. The teacher shows how to multiply to eliminate fractions in an equation. She then shows the steps in solving the equation by further isolating the variable.

Love those fractions?!? This lesson involves using the multiplication property of equality to eliminate the fraction in the given equation. In this equation, (2/3)( x-4)=4, the reciprocal of the fraction is used to eliminate it. The...

This equation has variables on both sides and the instructor demonstrates how to combine like terms to find the solution. It turns out that the solution has equal values on both sides of the equation, that's why it's an identity...

In honor of the 4th of July, Steve Spangler shows how to make an explosive concoction in red, white, and blue. Using hydrogen peroxide, dishwashing liquid, and yeast, he creates a colorful chemical reaction. Consider this combination...

This is a classic chemical reaction to use in your science class. Starch and iodine mix to cause a color change. Discuss with aspiring chemists the chemical and physical changes that occur as you demonstrate.

Acute, obtuse, right, and straight are all different types of angles. This clip provides a brief definition and example of each of the four types of angles. Tip: Have your class go on an angle hunt, the team that finds the most of each...

Brian explains about variables and uses cookies and friends to set up an example. He poses a word problem and then goes through the process to solve for the variable.

Identifying the theme of a piece is crucial to understanding. Using the play Romeo and Juliet as an example, the concept of theme is explored in a video of a classroom lecture.

Find the height of a trapezoid given the values of the two bases and the area. First write out the formula for the area of a trapezoid. Then identify all the variables and match up the given values. Now plug the values into the formula....

Learn how to use the formula for area to solve a problem about a rectangle. The demonstrator shows how to plug in the known values of a rectangle, and then how to use the formula for area to solve for the variable in question.

There are three variables in the formula for a parallelogram. Two of the values are given in this problem. Find the third value. Identify what each of the variables means. Match up the given values to the variables. Then solve for the...

So you are trying to tell me that a parallelogram is a rectangle in disguise? Wow! And I can use a similar formula of the area of a rectangle to find the area of a parallelogram? Wow! Ok, show me how! A=bh. So simple really.

Trying to find the area of a rectangle, a triangle, a circle, or a parallelogram? There are specific formulas to use to calculate the area of these shapes. But the given shape is not any of these. It's a composite shape, which means it...

Slice a large piece of pie or slice a small piece of pie? Whichever way you slice it, this piece of pie would be a fraction of the whole pie. This analogy corresponds with the sector of a circle being a piece of the pie. The size of the...

There are actually two formulas to find the circumference of a circle. One formula is based on knowing the diameter of the circle, and the other is based on knowing the radius of the circle. The instructor illustrates both formulas. She...

There are two formulas that can be used to find the circumference of a circle. Choose the appropriate formula depending on the given value in the problem. After selecting the correct formula, solve the problem using 3.14 as an estimation...

Are you looking for the formula for the area of a sector of a circle? But what's a sector? A sector is just a fraction of the area of a circle. Follow the instructor as she illustrates and labels the different parts of a circle. She also...

There are basically two things you need to know to find the area of a circle. First, you need to use the correct formula. Second, you have to know the value of the radius. If you know these two things then all you have to do is plug the...