Grade 2
  1. Number Sense and Operations  1.1. Counting and Number Sequences  1.1.1. Counting up to 100  1.1.2. Counting by 2s, 5s, and 10s  1.1.3. Counting Backward from 20  1.1.4. Odd and even numbers in counting sequences  1.2. Place Value  1.2.1. Understanding ones and tens  1.2.2. Comparing Two-Digit Numbers  1.2.3. Identifying the Value of Each Digit in a Number  1.2.4. Building numbers using tens and ones  1.3. Addition and Subtraction  1.3.1. Basic addition up to 20  1.3.2. Basic subtraction up to 20  1.3.3. Addition with Regrouping  1.3.4. Subtraction with Borrowing  1.3.5. Solving word problems involving addition and subtraction  1.3.6. Addition and Subtraction with Multiples of 10  1.4. Odd and Even Numbers  1.4.1. Identifying Odd and Even Numbers  1.4.2. Understanding patterns in odd and even numbers  1.4.3. Simple operations with odd and even numbers
  2. Fractions and Decimals  2.1. Introduction to Fractions  2.1.1. Understanding halves and quarters  2.1.2. Representing fractions visually  2.1.3. Simple Fraction Comparisons  2.1.4. Writing Simple Fractions  2.1.5. Fractions as part of a whole  2.2. Fraction Equivalency  2.2.1. Understanding Equal Parts  2.2.2. Identifying Equivalent Fractions
  3. Measurement and Data  3.1. Length Measurement  3.1.1. Measuring objects using rulers  3.1.2. Comparing lengths  3.1.3. Estimating lengths  3.1.4. Understanding units of measurement (centimeters and inches)  3.1.5. Relating Length Measurements to Real-World Objects  3.2. Weight and Mass Measurement  3.2.1. Comparing Weights of Objects  3.2.2. Estimating weight in grams and kilograms  3.2.3. Using balance scales for comparison  3.3. Volume and Capacity Measurement  3.3.1. Understanding capacity with cups and liters  3.3.2. Comparing capacities of containers  3.3.3. Introduction to Milliliters  3.4. Time  3.4.1. Reading analog and digital clocks  3.4.2. Understanding hours and minutes  3.4.3. Calculating elapsed time in hours  3.4.4. Days of the week and months of the year  3.4.5. Understanding AM and PM  3.5. Money  3.5.1. Recognizing coins and bills  3.5.2. Counting money up to $1  3.5.3. Simple Addition and Subtraction with Money  3.5.4. Making Change for a Dollar
  4. Geometry and Spatial Reasoning  4.1. Shapes and Their Attributes  4.1.1. Identifying basic shapes (circle, triangle, square, rectangle)  4.1.2. Understanding sides and corners  4.1.3. Distinguishing between 2D and 3D shapes  4.1.4. Recognizing 3D Shapes (Cube, Sphere, Cone, Cylinder)  4.1.5. Composing and Decomposing Shapes  4.2. Symmetry  4.2.1. Understanding Lines of Symmetry  4.2.2. Drawing Symmetrical Shapes  4.2.3. Identifying Symmetrical Objects in the Environment  4.3. Patterns and Spatial Awareness  4.3.1. Recognizing and Creating Patterns  4.3.2. Extending Patterns  4.3.3. Understanding positions (left, right, above, below)  4.3.4. Using a grid to locate objects
  5. Data Handling and Probability  5.1. Collecting and Organizing Data  5.1.1. Using tally marks  5.1.2. Reading Bar Graphs  5.1.3. Simple Pictographs  5.1.4. Creating Bar Graphs from Given Data  5.2. Interpreting Data  5.2.1. Answering questions based on data  5.2.3. Identifying Most and Least in Data Sets  5.3. Introduction to Probability  5.3.1. Understanding likely and unlikely events

Grade 2 → Measurement and Data ↓


Length Measurement


Welcome to our journey into the world of measuring length! Here, we'll explore how we can measure how long, high, or wide something is. It's a great skill that helps us in our everyday lives. Whether we're buying a bed, measuring our height, or even building something, understanding length measurements is a must. In this guide, you'll learn how to use units to measure things, and we'll do so through simple explanations, examples, and visual aids.

Understanding length

Length is a measurement that tells us how long an object is. It can also help us understand how far things are from one another. For example, if you've ever wondered how far school is from your home, that distance is a measure of length. Similarly, if you want to know how tall you are, you're actually measuring your height.

Different units of length

We use different units to measure length. The units we use in everyday life include inches, feet, centimeters, and meters. In this section, we will learn about each of these units.

1. Inches and feet

Inches and feet are commonly used units of length in the United States. Let's look at how we use each of these:

Inch : An inch is a very small unit of length.

1 inch = width of 1 thumb (approx)
Example: Measure the length of a pencil in inches.

1 inch

Feet : A foot is longer than an inch. A foot is made up of 12 inches.

1 foot = 12 inches

1 foot = 12 inches

2. Centimeter and meter

The centimetre and the metre are part of the metric system, which is used in many parts of the world:

Centimeter: This is a unit smaller than the meter. It is often used to measure small objects.

1 centimeter (cm) = 10 millimeters
Example: Measure the width of a book.

1 cm

Meter: Meter is a large unit of length. It is used to measure large lengths such as the height of a building or the length of a room.

1 meter = 100 centimeters

1 meter = 100 cm

Comparison of length units

It is useful to compare different units so that we can easily switch between them whenever we need. Let's look at the basic comparison between units:

  • 1 foot = 12 inches
  • 1 meter = 100 centimeters

Examples of comparison units

Let's compare the two units in some examples:

Example 1: 24 inches = 24 / 12 = 2 feet
Example 2: 200 cm = 200 / 100 = 2 m

Estimating the length

Sometimes we don't have a ruler or tape measure, and we have to estimate the length of something. This skill is called estimating length. A simple way to estimate length is as follows:

Estimate by comparison

Use a known object to estimate the length of another object. For example, if you know your pencil is about 8 inches long, and you are asked to estimate the length of a book, use the pencil as a reference.

Estimating stages

  • Choose an object of known length.
  • Compare it to the object you are assessing.
  • Count how many times the known object fits into the unknown object.

Practical exercises

Let's practice measuring length with some exercises:

Exercise 1: Measuring everyday objects

Find things in your home like books, pencils, shoes, etc. and measure their length using a ruler or measuring tape. Record your measurements and see if you can convert them into different units.

Exercise 2: Estimation

Estimate the length of your couch, table, or bed using an object like your shoe or hand. Then, measure it with a measuring tape to compare your estimate to the actual length.

Key takeaways

  • Measuring length is an important life skill.
  • Different units are used depending on the context, such as inches, feet, centimeters, and meters.
  • Practicing measurement and estimation helps improve accuracy.

This understanding of measuring length will help you in a variety of situations, from school projects to planning space for furniture or playing games that require such knowledge! Keep practicing, and soon you'll become a pro at measuring and estimating lengths.


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Length Measurement

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