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 → Patterns and Sorting ↓


Sorting by Size


Sorting is an important skill that helps us understand how things relate to each other. It involves arranging objects in a specific order based on a common property. In grade 1 math, sorting by size is one way to understand these concepts. Here, we will learn how to sort things from smallest to largest or largest to smallest. We will explore simple examples and understand how to compare sizes to figure out which is bigger or smaller.

Understanding size

Understanding size means knowing how big or small something is. We look at objects and compare their sizes to help us put them in order. For example, when you have a group of blocks, you can compare how tall or short each block is.

Examples of different sizes:

Look at the blocks above. Which block is the smallest? Which block is the tallest? This is an example of how we see different shapes.

How to sort by size

Sorting by size means putting things in order from smallest to largest, or vice versa. Here's how you can sort a group of items:

  1. Choose any two objects and compare their sizes.
  2. Decide which is bigger and which is smaller.
  3. Choose a common attribute to compare, such as height or length.
  4. Continue comparing each object to the other objects until they are all sorted.

Example of sorting from smallest to largest:

Above are circles of different sizes, ordered from smallest to largest. We started with the smallest circle, then found the next largest circle, and so on.

Example of sorting from largest to smallest:

In this example, we've sorted the squares from largest to smallest. We started with the largest square, then found the next smallest square, and continued on.

Use of sorting in real life situations

Sorting isn't just important in math class; it's useful in real life, too. Let's look at some situations where sorting by size can be helpful:

Sorting toys

Imagine you have a box full of toys. You can separate them by size, like keep all the small toys on one side and the big toys on the other side. This helps keep things organized.

Sorting clothes

When you're folding clothes, you can sort them by size. For example, put all small items of clothing, like socks, together and larger items, like pants, in another pile.

Sorting books

If you have a bookshelf, you can organize your books from smallest to largest so it looks neat. This is another way of sorting by size that can be useful.

Practical exercise on sorting by size

Interactive learning is a fun way to understand sorting. Here are some activities you can try:

Activity 1: Sort out kitchen items

Help them sort different kitchen items such as spoons, bowls and cups from smallest to largest. You can use real items or draw pictures. Compare each item and arrange them in a row.

Activity 2: Differentiate objects of nature

Collect leaves, stones or sticks from a park and sort them by size. This activity will encourage you to observe and be more aware of nature.

Why learning to sort is important

Sorting by size is a basic skill that contributes to cognitive development. Here are some of the benefits of learning to sort:

Enhances critical thinking

Sorting helps improve decision making and logical thinking by requiring decisions about classification and order.

Prepares you for math concepts

Understanding sorting is a prerequisite for learning other mathematical concepts such as numbers, sequences, and algebra.

Organizes daily life

Sorting objects by size teaches organization, which is a useful skill in everyday activities.

Summary

Sorting by size is an essential skill in grade 1 math that lays the groundwork for more advanced math concepts. By comparing and arranging objects by size, children develop critical thinking and organization skills. Through practice, sorting can become a fun and valuable part of learning and daily life.


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Sorting by Size

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