Grade 1
  1. Numbers and Counting  1.1. Counting to 10  1.2. Counting to 20  1.3. Counting to 50  1.4. Counting to 100  1.5. Writing Numbers 1 to 10  1.6. Writing Numbers 1 to 20  1.7. Writing Numbers 1 to 50  1.8. Writing Numbers 1 to 100  1.9. Reading Numbers 1 to 10  1.10. Reading Numbers 1 to 20  1.11. Reading Numbers 1 to 50  1.12. Reading Numbers 1 to 100  1.13. Comparing Numbers  1.14. Ordering Numbers  1.15. Odd and Even Numbers  1.16. Number Patterns  1.17. Skip Counting by 2s, 5s, and 10s  1.18. Understanding Zero
  2. Basic Addition and Subtraction  2.1. Understanding Addition  2.2. Addition Facts within 10  2.3. Addition Facts within 20  2.4. Adding Zero  2.5. Adding One More  2.6. Adding Two More  2.7. Adding Three More  2.8. Adding Using Pictures  2.9. Addition Word Problems  2.10. Understanding Subtraction  2.11. Subtraction Facts within 10  2.12. Subtraction Facts within 20  2.13. Subtracting Zero  2.14. Subtracting One  2.15. Subtracting Two  2.16. Subtraction Using Pictures  2.17. Subtraction Word Problems  2.18. Introduction to Doubles Facts  2.19. Introduction to Making 10
  3. Place Value and Number Sense  3.1. Understanding Tens and Ones  3.2. Counting by Tens  3.3. Place Value within 20  3.4. Place Value within 50  3.5. Place Value within 100  3.6. Reading and Writing Two-Digit Numbers  3.7. Comparing Two-Digit Numbers  3.8. Decomposing Numbers
  4. Measurement  4.1. Length  4.1.1. Comparing Lengths  4.1.2. Measuring with Non-Standard Units  4.1.3. Using Standard Units (Inches and Centimeters) in Length  4.2. Weight  4.2.1. Comparing Weights  4.2.2. Heavy and Light Objects  4.2.3. Introduction to Grams and Pounds  4.3. Capacity  4.3.1. Comparing Capacity  4.3.2. Full and Empty  4.3.3. Introduction to Liters and Milliliters  4.4. Time  4.4.1. Telling Time to the Hour  4.4.2. Telling Time to the Half Hour  4.4.3. Days of the Week  4.4.4. Months of the Year  4.4.5. Understanding Yesterday, Today, and Tomorrow  4.5. Money  4.5.1. Recognizing Coins  4.5.2. Counting Coins  4.5.3. Introduction to Dollar and Cents Symbols  4.5.4. Simple Addition and Subtraction with Money
  5. Geometry  5.1. 2D Shapes  5.1.1. Recognizing 2D Shapes  5.1.2. Drawing 2D Shapes  5.1.3. Naming 2D Shapes  5.1.4. Properties of 2D Shapes  5.1.5. Sorting 2D Shapes  5.1.6. Composing Simple Shapes  5.2. 3D Shapes  5.2.1. Recognizing 3D Shapes  5.2.2. Naming 3D Shapes  5.2.3. Properties of 3D Shapes  5.2.4. Sorting 3D Shapes  5.3. Position and Direction  5.3.1. Left and Right  5.3.2. Above and Below  5.3.3. Inside and Outside  5.3.4. Near and Far  5.3.5. In Front and Behind
  6. Patterns and Sorting  6.1. Recognizing Patterns  6.2. Extending Patterns  6.3. Creating Patterns  6.4. Sorting by Color  6.5. Sorting by Shape  6.6. Sorting by Size
  7. Data and Graphing  7.1. Introduction to Data  7.2. Collecting Data  7.3. Tally Marks  7.4. Bar Graphs  7.5. Picture Graphs  7.6. Interpreting Simple Graphs
  8. Fractions  8.1. Understanding Halves  8.2. Understanding Fourths  8.3. Dividing Shapes into Equal Parts  8.4. Identifying Equal and Unequal Parts

Grade 1 → Measurement ↓


Length


Welcome to this fun and easy exploration of length! In our daily lives, we come across many different objects, and often we want to know how long they are. This is where the concept of length helps us. Understanding length is very important because it helps us in many activities, such as organizing our toys, building things, creating fun art projects, and even cooking! Let's dive into the world of measuring length in simple ways that you will love.

What is the length?

Length is a measure of the length or length of something. Imagine a straight line. The distance from one end of the line to the other is called length. Length helps us compare and understand the size of different objects.

Start Ending

Why is length important?

Knowing length helps us do many important things. For example:

  • Organizing things: Knowing how tall a shelf is helps you organize your books neatly.
  • Building construction: Builders need to measure lengths to make sure walls are straight and buildings are safe.
  • Clothing: Fashion designers measure length to make sure clothes fit well.

How can we measure length?

There are many ways to measure length. Here are some common ways you can practice:

Using a ruler

A ruler is a flat instrument that shows length measurements. It usually has markings in centimeters (cm) and inches (in). You align one end of the ruler with the beginning of the object and read the number on the other end to find the length.

0 1 2 3 4 5 6

Measuring tapes

Measuring tapes are flexible and can measure longer lengths than a ruler. They are often used in construction and sewing. Measuring tapes also have markings to show measurements in centimeters and inches.

Use of everyday items

When a ruler or tape isn't handy, you can use everyday objects to estimate length. For example, you can use your foot, a pencil, or even your hand! This method isn't as precise, but it's helpful in a pinch.

Length comparison

Sometimes, we want to compare how long things are. You can use words like "longer," "shorter," or "the same length" to compare objects.

Suppose you have a pencil and a crayon:

pencil Crayons

You would say that the crayon is "long" and the pencil is "short." You could also say that the crayon is about the same length as two pencils. Comparing lengths helps us make smart decisions, such as choosing the right container to fit an object.

Handling various units

Sometimes, different units are used for measurement. Two popular units for measuring length are inches and centimeters.

1 inch = 2.54 centimeters

This relationship means that if you have a measurement in one unit, you can convert it to another unit using their relationship.

Practice with length

It's fun to practice measuring and comparing lengths!

Activity 1: Measuring objects around the house

Walk around your house and use a ruler or tape to measure different objects, such as books, tables or spoons. Write down their lengths and compare them. Which object is the longest? Which object is the shortest?

Activity 2: Making a chain of lengths of paper

Cut short, medium and long strips of paper. Tape the ends of each strip to make loops and then join the loops together to make a chain. Hang it somewhere in your room. How many short, medium and long loops did you use?

Fun games to play with length

Game 1: Length hunt

With friends or family, have a competition to find the longest and shortest objects in the room. Use a string to measure any object and see who finds the longest and shortest object first!

Game 2: Length treasure map

Create a treasure map using lengths. Create a map and set different objects as landmarks (for example, "5 pencils from the door is the treasure!"). Create clues about the lengths between different places to find the hidden treasure!

Conclusion

Understanding and measuring length is a skill that comes in handy every day. Whether you're decorating your room or building a treehouse, knowing about length helps you make informed decisions and successfully complete tasks. Keep practicing with rulers, tape, and playful activities to hone your skills. With practice, you'll become better and more confident at measuring and comparing lengths. Have fun exploring this interesting topic!


Grade 1 → 4.1


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Length

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