Grade 3
  1. Number Sense and Numeration  1.1. Understanding Numbers  1.1.1. Reading and Writing Numbers up to 10,000  1.1.2. Place Value up to Thousands  1.1.3. Comparing and Ordering Numbers  1.1.4. Rounding Numbers to the Nearest Ten and Hundred  1.1.5. Skip Counting by 2s, 5s, 10s, and 100s up to 1,000  1.2. Operations with Whole Numbers  1.2.1. Addition and Subtraction up to 1,000  1.2.2. Multiplication Facts (up to 10 x 10)  1.2.3. Division Facts (up to 100)  1.2.4. Multiplication as Repeated Addition  1.2.5. Division as Equal Sharing  1.2.6. Word Problems with Addition, Subtraction, Multiplication, and Division  1.3. Estimation  1.3.1. Estimating Sums and Differences  1.3.2. Estimating Products and Quotients  1.4. Understanding Even and Odd Numbers
  2. Fractions and Decimals  2.1. Understanding Fractions  2.1.1. Identifying and Representing Fractions  2.1.2. Fractions of a Whole and Part of a Set  2.1.3. Comparing and Ordering Fractions with Like Denominators  2.1.4. Equivalent Fractions  2.1.5. Simple Fraction Word Problems  2.2. Introduction to Decimals  2.2.1. Tenths and Hundredths as Decimals  2.2.2. Relationship between Fractions and Decimals
  3. Measurement  3.1. Length  3.1.1. Measuring in Centimeters and Meters  3.1.2. Comparing and Ordering Lengths  3.1.3. Estimating Lengths  3.1.4. Converting Between Centimeters and Meters  3.2. Mass  3.2.1. Measuring in Grams and Kilograms  3.2.2. Estimating and Comparing Mass  3.3. Capacity  3.3.1. Measuring in Milliliters and Liters  3.3.2. Estimating and Comparing Capacity  3.4. Time  3.4.1. Telling Time to the Nearest Minute  3.4.2. Calculating Elapsed Time  3.4.3. Using a Calendar  3.4.4. Understanding A.M. and P.M.  3.5. Area and Perimeter  3.5.1. Calculating Perimeter of Simple Shapes  3.5.2. Estimating and Measuring Area of Shapes  3.5.3. Finding Area by Counting Squares
  4. Geometry  4.1. Properties of Shapes  4.1.1. Identifying 2D Shapes (Triangles, Quadrilaterals, Circles, etc.)  4.1.2. Identifying 3D Shapes (Cubes, Spheres, Cylinders, etc.)  4.1.3. Describing Attributes of 2D and 3D Shapes  4.1.4. Recognizing Parallel and Perpendicular Lines  4.2. Symmetry and Transformations  4.2.1. Recognizing Lines of Symmetry  4.2.2. Identifying Flips, Slides, and Turns  4.3. Angles  4.3.1. Understanding Right Angles  4.3.2. Comparing Angles (Acute, Right, Obtuse)
  5. Data Management and Probability  5.1. Data Collection and Organization  5.1.1. Collecting Data using Surveys and Experiments  5.1.2. Organizing Data using Tally Charts and Tables  5.2.1. Creating and Interpreting Pictographs  5.2.2. Creating and Interpreting Bar Graphs  5.2.3. Reading Simple Line Graphs  5.3. Probability  5.3.1. Understanding Basic Probability Terms (Certain, Possible, Impossible)  5.3.2. Predicting Outcomes  5.3.3. Simple Probability Experiments
  6. Patterns and Algebra  6.1. Patterns  6.1.1. Identifying and Extending Numeric Patterns  6.1.2. Identifying and Extending Shape Patterns  6.1.3. Creating Patterns Using Rules  6.2. Introduction to Algebra  6.2.1. Understanding Variables as Unknowns  6.2.2. Solving Simple Addition and Subtraction Equations  6.2.3. Using Patterns to Solve Problems
  7. Problem-Solving Skills  7.1. Strategies for Problem-Solving  7.1.1. Using Pictures or Diagrams  7.1.2. Identifying Patterns in Problems  7.1.3. Making Organized Lists  7.1.4. Guessing and Checking  7.1.5. Using Logical Reasoning  7.1.6. Breaking Down Problems into Steps

Grade 3 ↓


Measurement


Measurement is a way of finding out about the size or amount of something. It helps us know how long, how heavy, how big, or how much something is. In Grade 3, you will learn about different types of measurements such as length, weight, and capacity. Students will learn how to measure things around them and use measurements in everyday life.

Length: measuring the length or length of something

Length is how long something is from one end to the other. We can measure length using different units such as centimeters (cm), meters (m), inches (in) and feet (ft).

Units of length

  • Centimeter (cm) - used for measuring small objects such as pencils or erasers.
  • Meter (m) - used to measure large objects like rooms or sofas.
  • Inch (in) – Used in the imperial system, common in the United States.
  • Foot (ft) – Another unit in the imperial system, where 1 foot = 12 inches.

Visual example: comparing lengths

Here is a comparison between a pencil and a book through a simple illustration.

pencil Book

You can see that the line representing the book is longer than the line representing the pencil. This shows that the book is longer than the pencil.

How to measure length

  1. Use a ruler or measuring tape.
  2. Place the ruler at one end of the object you want to measure.
  3. Read the number marked on the other end of the object. This number is the length.

Weight: measuring how heavy things are

Weight tells how heavy something is. Units of weight include grams (g) and kilograms (kg). These units help us measure how much something weighs.

Units of weight

  • Gram (g) - used to measure light objects such as a sheet of paper or a feather.
  • Kilogram (kg) - used for heavy items such as a chair or a bag of flour.

Visual example: weight in a basket

Below is a simple illustration of a weight placed in a basket.

1 kg 2 Kg

Here, the red circle represents 1 kg weight, and the blue circle represents 2 kg weight. This tells us that different objects can have different weights.

How to measure weight

  1. Use a yardstick.
  2. Place the object on the scale.
  3. Look at the number on the scale: this is the weight of the object.

Capacity: measuring how much liquid

Capacity means how much liquid something can hold. We use units like liters (L) and milliliters (mL) for capacity. This helps us understand how much liquid is inside a container.

Units of capacity

  • Liter (L) - used for larger volumes of liquid, such as a bottle of water.
  • Millilitre (mL) - used for small quantities, such as in medicine cups.

Visual example: liquid in a glass

Let's see how much liquid is in these glasses.

150ml 100 ml

The first glass can hold 150 milliliters of liquid, while the second glass can hold 100 milliliters of liquid. We can compare them to see which glass can hold more liquid.

How to measure capacity

  1. Use a measuring cup or graduated cylinder.
  2. Pour the liquid into a measuring device.
  3. Read the number on the side of the device. This is the capacity in liters or milliliters.

Comparing and estimating measurements

Sometimes, we compare objects to understand their size, weight or capacity. When we do not have measuring instruments, estimating helps.

Examples of comparing measurements

Comparing the length of a pencil and a ruler, the ruler is longer. In terms of weight, a textbook is heavier than a notebook.

Simple estimation strategies

  • For length, use known objects. If you know a finger is about 1 cm, use that to estimate the length.
  • For weight, compare with objects of known weight. A bunch of keys can weigh about 100 grams.
  • For capacity, use the cup to estimate the liquids. A small cup can hold about 250 milliliters.

Visual example: estimation

finger (1 cm) Guess the Object

Here, if your finger is 1 cm, you can align it next to the objects to estimate their length.

Measurement practice

Learning measurements is best done through practice. Try measuring different objects at home or at school.

Fun measurement activities

  • Measure the length of different objects with a ruler. Compare them.
  • Weigh different fruits on a scale to see which fruit is the heaviest.
  • Use a water bottle to measure how much water different cups can hold.

Conclusion

Measurement is everywhere. It helps us understand and compare the world. By learning measurement, we can solve everyday problems and have fun exploring the world around us.


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