Comparing Lengths of Objects | Math for 1st Grade

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In today’s lesson, we explored how to order and compare the heights of flowers and animals, as well as the lengths of various objects. We practiced identifying the tallest and shortest flowers, comparing the heights of animals using blocks, and measuring lengths with a ruler. By engaging in these activities, we learned the importance of careful observation and measurement in understanding size and length.
  1. What is the tallest flower we learned about?
  2. Can you tell me which animal is the tallest?
  3. How do we find out which object is longer, the pencil or the pen?

Hello, Friends!

Today, we’re going to have some fun with flowers and animals! Let’s learn how to order things by size and compare their heights. Are you ready? Let’s go!

Ordering Flowers

First, let’s look at some pretty flowers. We need to figure out which ones are the tallest and which are the shortest. Here’s how we do it:

Question 1: Which Flower is the Tallest?

Look at all the flowers. The yellow flower is the tallest because it reaches the highest. Let’s circle the yellow flower!

Question 2: Which is the Second Shortest Flower?

We need to find the flower that’s not the shortest but the next one. The red flower is the shortest, so the pink flower is the second shortest. Let’s circle the pink flower!

Question 3: Which Flower is Shorter than the Yellow Flower but Taller than the Purple Flower?

We need a flower that’s in between. The blue flower is shorter than the yellow flower but taller than the purple flower. Let’s circle the blue flower!

Question 4: Which Flowers are Taller than the Purple Flower?

Let’s find all the flowers taller than the purple one. The yellow and blue flowers are taller, so let’s circle them!

Question 5: Which Flower is Shorter than the Pink Flower?

The red flower is the only one shorter than the pink flower. Let’s circle the red flower!

Great job! Remember, when you order things, look carefully and read the questions closely.

Comparing Animal Heights

Now, let’s compare some animals using blocks. We have an elephant, an ostrich, a monkey, and a giraffe. Let’s see how tall they are!

Question 1: The Giraffe is How Many Blocks Tall?

Let’s count together: one, two, three, four, five, six, seven, eight, nine, ten, eleven. The giraffe is 11 blocks tall!

Question 2: Which Animal is Seven Blocks Tall?

Let’s count the elephant: one, two, three, four, five, six, seven. The elephant is seven blocks tall!

Question 3: The Monkey is How Many Blocks Tall?

Let’s count: one, two. The monkey is two blocks tall!

Question 4: Which Animal is Five Blocks Tall?

The ostrich is five blocks tall. Let’s count: one, two, three, four, five. Great job!

Awesome work comparing the heights of these animals!

Comparing Objects by Length

Now, let’s compare some objects to see which ones are longer or shorter.

Question 1: Pen and Pencil

The pencil is longer than the pen. Let’s check the pencil!

Question 2: Pencil and Paintbrush

The paintbrush is longer than the pencil. Let’s check the paintbrush!

Question 3: Pen or Brush?

The paintbrush is longer than the pen. Let’s check the paintbrush!

Question 4: Eraser and Chalk

The chalk is longer than the eraser. Let’s check the chalk!

Question 5: Paper Clip and Eraser

The eraser is longer than the paper clip. Let’s check the eraser!

Question 6: Key or Spoon?

The spoon is longer than the key. Let’s check the spoon!

Great job comparing lengths!

Measuring with Inches

Let’s learn how to measure with a ruler. If we line up a pencil with a ruler, we can see how long it is in inches.

Measuring Pencils

The first pencil is 10 inches long. The blue pencil is 5 inches long. The red pencil is 7 inches long. The yellow pencil is 9 inches long.

That’s how we measure! Great job today!

Thanks for learning with us! See you next time!

  • Can you think of a time when you had to figure out which of your toys or objects at home were the tallest or shortest? How did you decide which was which?
  • Imagine you are in a garden with many different flowers. How would you describe the flowers to a friend who can’t see them? What words would you use to talk about their sizes and colors?
  • Have you ever seen animals at a zoo or in a book? Which animal do you think is the tallest, and which one is the shortest? Why do you think so?
  1. Flower Height Hunt: Go on a nature walk with a grown-up and find different flowers or plants. Bring a notebook and draw each flower you find. Try to order them from tallest to shortest. Can you find a flower taller than you? What about one shorter than your hand?

  2. Animal Block Building: Use building blocks to create towers representing the heights of different animals. For example, build a tower with 11 blocks for a giraffe and 7 blocks for an elephant. Compare your towers. Which is the tallest? Can you make a tower for an animal that is 3 blocks tall?

  3. Length Detective: At home, find objects like a spoon, a pencil, and a toy. Use a ruler to measure each one in inches. Write down their lengths and order them from shortest to longest. Which object is the longest? Can you find something longer than the longest object you measured?

Sure! Here’s a sanitized version of the transcript, removing any unnecessary repetitions and maintaining clarity:

[Music]

Hello, boys and girls! It’s Teacher Mike here, and today we’re going to look at a worksheet that asks us to order flowers from tallest to shortest. First, let’s read the directions and then we’ll get started right away. These word problems can be tricky, so we need to read them carefully.

Look at the picture of the flowers, then answer the questions by circling the correct answers. First, let’s remind ourselves what “tallest” and “shortest” mean. Tallest means the highest or furthest from the ground, while shortest means the closest to the ground or the smallest.

Let’s get started with these word problems.

**Number one:** Which flower is the tallest?
That’s easy! If we look at all the flowers, we can see that the yellow flower is the tallest. It is bigger than all the other flowers, so let’s circle the yellow flower.

**Number two:** Which is the second shortest flower?
This is where it gets tricky. We need to find the second shortest flower, not the shortest one. The shortest flower is the red flower. The blue flower is shorter than the yellow flower but taller than the purple and pink flowers. Therefore, the pink flower is the second shortest. Let’s circle the pink flower.

**Number three:** Which flower is shorter than the yellow flower but taller than the purple flower?
We need to find a flower that’s in between the yellow and purple flowers. The red flower is the shortest, and the pink flower is shorter than the purple flower. That leaves us with the blue flower, which is shorter than the yellow flower but taller than the purple flower. The blue flower is the correct answer.

**Number four:** Which flowers are taller than the purple flower?
We can circle all the flowers that are taller than the purple flower. The yellow flower and the blue flower are both taller than the purple flower, while the red and pink flowers are shorter. So, let’s circle the blue and yellow flowers.

**Final question:** Which flower is shorter than the pink flower?
Looking at the worksheet, we can see that only the red flower is shorter than the pink flower. All the other flowers are taller than the pink flower, making the red flower the only one that is shorter.

Remember, boys and girls, when you’re ordering plants or anything else, you have to look carefully at the picture and read the word problems even more carefully, as they may ask about the second shortest or second tallest flower.

Thanks for watching, and we’ll see you next time!

Next, we will compare the height of different animals. We have an elephant, an ostrich, a monkey, and a giraffe. We’ll compare their heights based on how many blocks are stacked next to them.

The directions say to look at the picture and complete the sentences by checking the correct answers.

**Number one:** The giraffe is blank blocks tall.
Let’s count how tall the giraffe is. Count with me: one, two, three, four, five, six, seven, eight, nine, ten, eleven. The giraffe is 11 blocks tall, so we will check the number 11.

**Number two:** The blank is seven blocks tall.
It can’t be the giraffe since we just found out it’s 11 blocks tall. Let’s check the elephant. Count with me: one, two, three, four, five, six, seven. The elephant is seven blocks tall, so we will check that.

**Number three:** The monkey is blank blocks tall.
Let’s count how tall the monkey is: one, two. The monkey is two blocks tall, so we will check the number two.

**Number four:** The blank is five blocks tall.
We already know the giraffe is 11 blocks tall, the elephant is seven blocks tall, and the monkey is two blocks tall. The only one left is the ostrich. Let’s check: one, two, three, four, five. The ostrich is five blocks tall, so we will check that.

Great job today, boys and girls! You did an awesome job comparing the heights of these animals.

Now, let’s look at another worksheet about comparing objects by length. We will compare objects with a third object.

The directions say to check the longer object in each pair and answer the questions.

First, we have a pen and a pencil. The pencil is longer, so let’s check the pencil.

Next, we have the same pencil and a paintbrush. The paintbrush is longer, so let’s check that.

Now for the tricky question: which is longer, the pen or the brush?
We know the pen is shorter than the pencil, and the paintbrush is longer than the pencil. Therefore, the paintbrush is longer than the pen.

Next, we have an eraser and a piece of chalk. The chalk is longer, so let’s check that.

Now we have a paper clip and the eraser. The eraser is bigger, so let’s check that.

For the tricky question: which is shorter, the paper clip or the chalk?
The chalk is longer than the eraser, and the paper clip is shorter than the eraser. Therefore, the chalk is longer than the paper clip.

Finally, we have a key and scissors. The scissors are bigger than the key.

Now we have a spoon and the scissors. The spoon is bigger, so let’s check that.

For the tricky question: which is longer, the key or the spoon?
The key is shorter than the scissors, and the spoon is bigger than the scissors. Therefore, the spoon is longer than the key.

Thanks for watching, boys and girls! We’ll see you next time!

Now, let’s solve a word problem about the heights of girls.

The first problem states that Emma is shorter than Jenny, and Jenny is shorter than Sarah.
To figure this out, we can write out the information: Emma, Jenny, and Sarah.
Since Emma is shorter than Jenny, and Jenny is shorter than Sarah, we know that Sarah is the tallest, Jenny is in the middle, and Emma is the shortest.

Now, let’s check the pictures. The tallest is Sarah, the middle height is Jenny, and the shortest is Emma.

Let’s double-check: Emma is shorter than Jenny, and Jenny is shorter than Sarah. That makes sense!

Now, let’s do the same for the boys.
The problem states that Ben is taller than Jack, and Jack is taller than Tommy.
We can write out the names: Ben, Jack, and Tommy.
Ben is the tallest, Jack is in the middle, and Tommy is the shortest.

Let’s check the pictures. The tallest is Ben, the middle height is Jack, and the shortest is Tommy.

Double-checking: Ben is taller than Jack, and Jack is taller than Tommy. That makes sense too!

Great job today! Bye-bye!

Now, let’s look at our next worksheet, “Flower Math.”
The directions say to find the length of these flowers by comparing them to the number of red beads and circle the correct answer.

For the first flower, we count the red beads: one, two, three, four, five, six, seven, eight, nine, ten, eleven, twelve, thirteen, fourteen, fifteen, sixteen, seventeen, eighteen, nineteen. That’s 19 beads!

For the second flower, we count: one, two, three, four, five, six, seven, eight, nine, ten, eleven. That’s 11 beads!

For the last flower, we count: one, two, three, four, five, six, seven, eight, nine, ten, eleven, twelve, thirteen, fourteen. That’s 14 beads!

Great job today! See you later!

[Music]

Now, let’s learn about measuring in inches.
If I take this pencil and lay it against my ruler, I would line up the end of the pencil with the beginning of the ruler. The pencil measures three inches long.

Now, let’s see how long these pencils are.

The first pencil is lined up against the ruler and goes to ten. So, I will circle ten.

The blue pencil goes to five, so I will circle five.

The red pencil goes to seven, so I will circle that.

The yellow pencil goes to nine, so I will circle nine.

That’s how we measure! Great job today!

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This version maintains the educational content while ensuring clarity and conciseness.

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