Topic 6: Area and Population

We’ve been learning about all kinds of incredible ways that we use math and numbers in the real world. Math is around us every single day, we often just don’t stop to think about it. Math can be found when we walk into stores, when we look at how many watts are in a lightbulb in our house, or even when we are using up gas in a car. Now, look around you. Is there anyone else in the room with you? How big or small is the room that you’re in right now? Math is tied into those ideas as well!

When we’re trying to determine how many people live in a certain place, that’s called population. The population of a country is just how many people live there. Do you know what the most populated country is? How about the second most populated? I think you’d be surprised to know just how many people live in those countries!

A lot of times when working with the population of countries, we use something called population density. This refers to the number of people compared to the size of a state or country. For example, New Jersey has the highest population density in the United States. This means it has the highest number of people living within its area. In order to determine that, not only is the population important to calculate but also the area.

As mentioned above, area is also an important math concept that we use when looking at states or countries. Area represents the size of something that is 2-dimensional. In math, we often try to find the area of shapes such as rectangles, triangles, and circles. This same idea is used to find the area of places where people live. Do you know what country has the largest area?

Check out our slideshow that we made to share some interesting facts we found about population and area. See if you can answer some of the math problems that we presented.


Were you able to solve any of the problems in the slideshow? Which one did you try and what did you find for an answer?

Can you come up with a math problem from the information we shared? If so, please share it here and we’ll try to answer it!


Topic 3: Recipes – As Easy as Pi(e)

With recipes being the topic this week, it tied in perfectly with today. It just so happens that today is March 14, which here in the United States we often write as 3-14. Well, this represents a very important number in math. It represents a number that we call pi. Now that’s not pie, like the kind you eat. We’ll get to that in a minute. Pi (π) is often written as 3.14. That represents the number of times that the diameter of a circle fits into the circumference of a circle.

Every year, we like to celebrate Pi Day because it’s something that we learn about it sixth grade. We use pi (3.14) to find both the circumference and area of a circle. The circumference is the distance around a circle. The area is the amount of space inside of a circle (or how many square units can fit into a circle). To celebrate, students bring in pies (not numbers but the actual food). We measure each pie to find the radius and diameter of it. Then, we use those numbers to find the circumference and area! Check out some pictures from our day below.

If you’d like to learn a little bit more about circumference and area, you can watch two of our Math Movie Network videos from last year.

Some students brought in recipes for the pies that they made. We’ve shared them in the presentation below. You can learn about some of the common types of pies that we eat in here in Massachusetts and then you can see how you can make it at home!


Have you ever heard of pi (π) before?

What is your favorite type of pie to eat?


Are the pies that you eat similar or different to the pies that we like to eat?