What a fresh approach to learning about water! Chef Jamika Pessoa explains the chemical composition of this vital compound, what happens when heat is added or removed, and how much water is contained in different organs and...

Of particular interest to a group of business and finance pupils, this lesson plan explores depreciation of automobile values by comparing the double declining balance to the straight line method. Mostly this is done through a slide...

A scenario is presented for chemistry techs to address. Using titration techniques, they must analyze hydrogen peroxide solution samples. They evaluate accuracy and precision in the process. They also gain experience consulting the MSDS...

Aspiring astronomers study stars. They compare stars and explain the relationship between radius, mass, and diameter. By creating a star simulation, they discover how a binary star system's orbit can cause changes in the observed...

Sam bought tickets for a school raffle and wants to know if he has a good chance of winning. Help him find out with this step-by-step presentation on basic probability. Examples clearly model how to find the probability of simple events...

So x amount of people were surveyed and 68 of them said algebra was their favorite subject. Set up a percent proportion to identify the number of people surveyed. That's often the hardest part, setting up the equation. So observe the...

Powers of 10 are about moving the decimal around. The instructor illustrates how to move the decimal when it's ten percent or it's one percent. Once you understand this procedure you can do the mental math, in your head of course!

What are compatible numbers? What are they used for? Is it like estimating? Is it like rounding numbers? The teacher will answer these questions and explain how to use compatible numbers.

Trying to figure out how much something is marked down? There are a few steps to get your answer so follow along and watch as the instructor takes you through the process.

Cross multiply and solve for the unknown variable in this proportion problem. Then use the division property of equality to isolate that variable and get your solution.

Percent is the number of something per 100. It can be written with a percent sign (%), or as a decimal, or as a fraction- a number over 100.

A percent is a value over 100. You are given a fraction and need to make it a percent. Some calculations will need to be made to find an equivalent fraction. The instructor shows you how to make those calculations to the numerator and...

Money, money, money. Love it! You want to earn interest on what you put into your bank account. So you make an investment to earn compound interest and you want to know how much money you will have in 60 months. Well, there's a formula...

Create a percent proportion using the given values in this word problem. Not sure how to set that up? Then watch this short video and see how the teacher sets up this percent proportion according to the given values.

There are 20 kids on a bus, 60% of them have blue backpacks. How many is this? The teacher shows how to solve a percentage word problem using proportion ratios.

How much am I supposed to tip for this meal? Many have asked this question. The instructor uses a visual to first set up the known numbers and then writes the ratios to solve the problem.

Learn how to set up a proportion to determine how much additional tax you have to pay for an item.

The concept of percent discount is very clearly explained in this informative tutorial. Learners will work through a real life discount problem using algebraic reasoning and a clearly outlined procedure. This is a good video.

The objective of this activity is to find the percent of the area of a two squares overlapping. Mathematicians find the ratio of area for the part that overlaps to the rectangle formed. The final answer is a percent as a rate per 100....

Your class is to find the percent of the lot that is not covered by a house. Make sure your pupils understand the problems before they begin. The lot is the whole of the percent problem and the house is the part. The exercise is good...

Taxi! Have your travelers figure out how far they can go in a taxi for $10.00. They must account for the mileage rate and tip in their calculation. They can set up a table or make an equation to solve for the exact mileage they can...

When three classrooms are to split up prize money, your mathematicians must find the percentage that each class deserves and calculate the total amount. There is an option to use a calculator and practice rounding. 

Everyone loves a sale, and this worksheet allows learners to calculate which sale is more rewarding. The activity can be adapted for different thinking contexts. The answer key describes different answer choices, some being higher...