Firefighter FractionsFirefighter FractionsFirefighter FractionsFirefighter Fractions

Grade 1 MathematicsGrade 1 MathematicsGrade 1 MathematicsGrade 1 Mathematics

Number, Operation Number, Operation and Quantitative and Quantitative

reasoningreasoning

Number, Operation Number, Operation and Quantitative and Quantitative

reasoningreasoning

KIDSTEACHERS

• (1.2) Number, Operation and Quantitative reasoning. The student uses pairs of whole numbers to describe fractional parts of whole objects or sets of objects.– (B) uses appropriate

language to describe part of a set such as three out of the eight crayons are red.

Grade 1 Mathematics

Purpose• This presentation is designed for first

grade mathematics class. It is intended for the individual student to view after or during an initial lesson about the concept of fractions. Students will participate and interact with the presentation in order to reinforce the concept learned.

• Fractions are made when we have more than one of something.

What are fractions?

• Fractions are made when we have more than one of something.

What are fractions?

• There are FOUR dogs.

What are fractions?

• We make fractions when we compare PART of the group with the WHOLE group.

What are fractions?

• THREE dogs are in the corner.

What are fractions?

So, the way we say this as a fraction is:

What are fractions?

THREE out of FOUR dogs are in the corner

• For example, if we have THREE fire trucks

What are fractions?

What are fractions?

• For example, if we have THREE fire trucks, and you take ONE of them,

What are fractions?

• For example, if we have THREE fire trucks, and you take ONE of them, you now have ONE out of THREE fire trucks.

That’s all you need to know for now.

Once again….

Take the number of objects that you have, and that’s your FIRST number.

I have TWO helmets.

That’s all you need to know for now.

Once again…

Take the number of objects total, and that’s your SECOND number.

There are FIVE helmets.

That’s all you need to know for now.

Once again…

The way we say this as a fraction is TWO out of FIVE helmets.

That’s all you need to know for now.

Once again…

The way we say this as a fraction is TWO out of FIVE helmets. -Or-

2 out of 5 helmets

Let’s put this to some Let’s put this to some use!use!

Let’s put this to some Let’s put this to some use!use!

How would you like to come with me and help How would you like to come with me and help the fire department for a day?the fire department for a day?

LET’S GO!!!LET’S GO!!!

JJ is out walking his dog, Spot. When he crosses the street (after looking BOTH ways of course), he notices something….. funny.

UH OH.

Oh no! The empty house across the street is on

fire!

Call 9-1-1 and get the fire trucks coming, FAST!

Call 9-1-1 and get the fire trucks coming, FAST!

Here they come!!!

Here comes the Fire Chief!!!

Here comes the Fire Chief!

The Fire Chief says:“Help me, JJ. I need

your help keeping track of where my fire trucks and firefighters are at ALL times.”

Here comes the Fire Chief!

The Fire Chief says:

“Here’s my first problem.”

Are you READY?

Problem #1Ladder Trucks… how

many?

Chief Says:

“JJ, I have FIVE fire trucks out there right now. TWO of them have ladders on them.”

Problem #1Ladder Trucks… how

many?

Chief Says:“Tell me, JJ, I need

to know what fraction of my trucks are ladder trucks.”

Problem #1Let’s work this one together.

• I have TWO ladder trucks.

• There are FIVE fire trucks.

Problem #1Let’s work this one together.

“That’s easy, Chief, TWO out of FIVE fire trucks are ladder trucks!”

Problem #1Let’s work this one together.

“That’s easy, Chief, TWO out of FIVE fire trucks are ladder trucks!”

Problem #2Where are my firefighters?

Chief Says:

• “Good. Ok-- See that fire truck over there?”

Problem #2Where are my firefighters?

Chief Says:• “That truck came

with SIX people. That’s what I call a full truck. I see ONE person near the truck.”

Problem #2Where are my firefighters?

Chief Says:“He’s safe, but

those guys over there are in danger if that house falls.”

Problem #2Where are my firefighters?

Chief Says:• “This one’s not as

easy. Tell me what fraction of my firefighters are IN DANGER, JJ. I need to know.”

Use this time to work the problem.

• SIX firefighters• ONE is outside, pumping water• What fraction of the firefighters in

danger by the house?

• Have the answer? Let’s see how you did…

We have SIX firefighters. If ONE is still by the truck, we have to subtract to find how many are by the house.

Problem #2Where are my firefighters?

6 – 1 = 5

Problem #2Where are my firefighters?

That means there are FIVE firefighters by the house.

There are SIX firefighters total.

Problem #2Where are my firefighters?

Problem #2Where are my firefighters?

“So, Chief, FIVE out of SIX firefighters are by that house.”

Problem #3Who’s left?

Chief Says:

• “Look, JJ, we did it! The fire is out. And we even saved most of the house!”

Problem #3Who’s left?

Chief Says:

• “I just have one more problem for you.”

Problem #3Who’s left?

Chief Says:• “I’m sending

everybody back in service except for that one truck over there. That means everyone gets to go but them.”

Problem #3Who’s left?

Chief Says:

• “JJ, What fraction of my trucks are left?”

Use this time to work the problem.

• We had FIVE fire trucks.• All have left but ONE.• What fraction of the fire trucks are

still here?

• Have the answer? Let’s see how you did…

Problem #3Who’s left?

• We have ONE fire truck left.

Problem #3Who’s left?

• We have ONE fire truck left.

• There were FIVE fire trucks altogether.

Problem #3Who’s left?

• “So, Chief, ONE out of FIVE fire trucks are still here.”

Good Job!!

“JJ, I’m making you and Spot honorary firefighters for your hard work on this scene today!”

Good Job!!

“I don’t think I could have done it without you!”

“Aw, well, it was nothing, Chief…” (should I tell him we learned all about fractions last week?)Nah….

Good Job!!

Credits• AskERIC website

– http://askeric.org/Virtual/Lessons/Mathematics/Arithmetic/ATH0023.html

• The Cy-Fair Volunteer Fire Department• Dave’s Firefighter Web Gallery

– http://www.geocities.com/daves_gallery

• George Strait– Greatest Hits “The Fireman”

Credits• Lesson PlanZ

– http://www.lessonplanz.com

• Pennsylvania Firefighters Website– http://www.pafirefighter.net/clipart/

TEKS website– http://www.tea.state.tx.us/teks

That was the END.Where do you want to go?• Content and TEKS• All About Fractions• Practice• The Big Fire

• Problem 1• Problem 2• Problem 3• I want to do it aga

in!