Dwire+March+Fractions

Part 1

I love pizza. I also love sharing and eating pizza with my friends.

The Ninja Turtles are sharing their pizza too. It looks like they get 2 slices each. You might be asking yourself how I know this...

I know because I learned about fractions and that is what we are going to be learning about today and this month.

There are lots of fractions but today we are going to learn about





and

. In order to have a fraction, we must have a whole piece to start with.

Now if I wanted to cut this circle so that me and a friend could each have a piece that is the same size, I would cut it in half or in one half.

There is a perfect line in the middle of the circle that makes my whole circle turn into two equal pieces.

If I had my whole piece again and I wanted to cut it for 3 people, I would cut it into 3 equal pieces like this.



Notice that the circle is cut into 3 even pieces. We can tell that the pieces are even because they are all the same size.

What if I wanted to split my whole up into 4 equal pieces?



Are the pieces even? How can you tell? (they are all even, the same size).

Now you might be saying to yourself "That's great teacher Javier, but the world doesn't work in circles. Can other shapes be divided evenly?"

Yes!

(show students how to cut the rectangle in 1/2, 1/3, and 1/4)

Here are some other shapes. Let see if we can cut them in half.







What about this car? Can it be cut in half? What about in thirds? (have students cut the car in half and in thirds)



What about this pizza? Can we cut it in halfs? Thirds? Enough for the whole class?!?!



(pass out fraction worksheet)

Part 2:

Last week we talked about fractions. Who can tell me what a fraction is? (a part of a whole)

Today we are going to focus on the fraction...



When we cut a whole piece in half, we have two equal size pieces. Equal means that the pieces are the same.

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Let's look at this rectangle. How would I cut this shape in half? (cut shape in half).

Do I have two equal size pieces?



How would I cut this apple in half? What about this triangle?

Can we cut this pizza in half?

Looking at these shapes, some of them are cut in equal parts and some are not. Circle the shapes that are cut in equal parts.



(1/2 worksheet)

Last week we talked about taking a whole and cutting it in half. When we talking about cutting something in half, that means that we are cutting it into 2 pieces that are equal (or the same size). Here is a rectangle, how would we cut this in half?

How about this apple? How might we cut this in half?



This week we are going to talk about a fraction that we briefly talked about a few weeks back. The fraction is 1/4.



Does this number look like 1/2? (write 1/2 next to 1/4 on the board). What do they have in common?

When we are cutting a whole into a half, we are cutting that object into 2 separate equal size pieces. Like 1/2, when we are cutting a whole into 1/4 (or fourths), we are cutting it into 4 equal size pieces.



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Here is a whole circle. 1) Let's cut it in half (have a student cut it in half). 2) Now how would we cut it into 4 equal pieces? (call on other students to try, and then model if none are able). 3) Now that we have cut the circle into 4th's, can you shade or color in 1 of those pieces?



Let's try cutting these things into fourths. (After cutting, have student shade 1/4)





(do Fourth/Quarter worksheet)