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 ↓


Capacity


Capacity is a concept that helps us understand how much a container can hold. It tells us about the space inside the container and how much liquid or substance the container can hold. In grade 1 math, learning about capacity helps young children connect with everyday objects and understand the concept of "full", "empty" and "half full".

What is the capacity?

Capacity refers to the amount of liquid that a container can hold. Think of a glass of water. How much water can the glass hold? That is its capacity.

Understanding containers

Let us take different containers that we see every day such as bottles, cups, jars and buckets. Each of these containers can hold a certain amount of whatever we put in them. Some containers can hold more, and some containers can hold less. This difference is what we call “capacity”.

Full, empty and half full

Now, let's get familiar with some terms that describe capacity:

  • Full: A container is full when it can't hold any more liquid. Imagine pouring water into a glass until it reaches the top.
  • Empty: A vessel is empty when it has no liquid in it. Think of a glass with no water in it.
  • Half full: A container that is half full is half empty. Imagine a glass with water right in the middle.
full half full empty

Comparison of capabilities

Let's learn how we can compare the capacity of different containers. For example, a large jug can hold more water than a small cup. When comparing two containers:

  • If a container can hold more items, it has a larger capacity.
  • If a container can hold less items, its capacity will be less.
Big Jug Small Cup

Activities with potential

There are many fun activities to help children learn about potentials:

  1. Water game: Use different containers and water to see which one has more or less water.
  2. Sand Play: Use different sized buckets to understand capacity when playing with sand in the sandbox.
  3. Graduated cylinders: Fill them using a measuring tape to know exactly how much each cylinder can hold.

Using simple measurement terms

In capacity, we use basic measurement terms. For grade 1, it's more about understanding relative sizes than exact numbers. Phrases like "holds more" or "holds less" will be more relevant to first grade students rather than focusing explicitly on measurement units like liters or milliliters.

Practical example

Let's look at some everyday examples where we see potential:

  • Milk carton: How much milk does it hold? This is its capacity.
  • Juice box: How full can it be? This is its capacity.
  • Bathtub: The maximum amount of water it can hold is its capacity.
Juice Box Milk carton Bathtub

Conclusion

Understanding capacity is an essential part of children's learning about the physical world. Teaching capacity through comparisons, activities, and relatable examples helps children grasp concepts more effectively. They begin to understand how different contexts apply the idea of capacity, enriching their daily experiences and mathematical understanding.


Grade 1 → 4.3


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Introduction to Grams and Pounds
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Comparing Capacity

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Capacity

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