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 → Time ↓


Understanding Yesterday, Today, and Tomorrow


Understanding time is an essential skill that helps us organize our daily lives. At the first-grade level, it's important to understand the basic concepts of time, especially the ideas of "yesterday," "today," and "tomorrow." In this detailed explanation, we'll dive into these concepts using simple language, text examples, and engaging visual representations to make learning about time effective and fun.

Time concepts: yesterday, today and tomorrow

Time can be viewed as a sequence of events: what happened before, what is happening now, and what will happen next. "Yesterday," "today," and "tomorrow" are the simplest ways to express these ideas.

What's tomorrow?

We use the word "tomorrow" to talk about the day before today. Imagine you have a calendar in front of you. If today is marked, then the day right before it is "tomorrow".

Tomorrow Today Tomorrow

In this calendar example "tomorrow" is shown in the blue box, which comes immediately before the orange box, which is "today."

Text examples of "yesterday":

  • If today is Monday, then yesterday was Sunday.
  • Yesterday I played in the park with my friend.

What's today?

We use the word "today" to talk about the present day. This is the day we are living in right now. Everything we do today happens at this particular time.

Today Now

This imagery emphasizes “today,” because we are in this moment, and emphasizes “now,” represented by the orange circle.

Text examples for "today":

  • If it's sunny today I will go for a walk.
  • We have math class this morning.

What's tomorrow?

"Tomorrow" is the word we use to talk about the day that comes after today. Just like "yesterday" was before today, "tomorrow" is the day that comes after it.

Tomorrow Future

In this example “tomorrow” is shown as the yellow box, leading to the future, represented here by a sloping path.

Text examples of "yesterday":

  • If today is Tuesday, then tomorrow will be Wednesday.
  • Tomorrow I am planning to read my new book.

Connecting yesterday, today and tomorrow

Now that we understand what “yesterday”, “today” and “tomorrow” mean individually, let’s see how they are related to each other.

Tomorrow Today Tomorrow

The picture shows how time progresses: from “yesterday” to “today” and “tomorrow”.

Activity: Making a timeline

To understand these concepts better, let's draw a simple timeline using events from our daily lives.

Required Materials:

  • a long piece of paper
  • Crayons or markers
  • ruler

Phase:

  1. Use a ruler to draw a long line on the paper starting from the left side all the way to the right side.
  2. Divide the line into three parts. Label the first part "yesterday," the middle part "today," and the last part "tomorrow."
  3. Think of one event that happened yesterday and draw it or write it down in the “Yesterday” section.
  4. Do the same for “today,” draw or write down what you are doing right now.
  5. Select an event you plan to do tomorrow and add it to the “Tomorrow” section.

This activity reinforces the sequential concept of time and how these three periods fit together in our daily routine.

Why understanding timing is important

Understanding the concepts of "yesterday", "today" and "tomorrow" is not just a math lesson. It's about acquiring an essential skill to help us plan, organise and understand our world.

By understanding these basic time concepts, children learn:

  • Establishing connections between different days and experiences.
  • Organizing your thoughts and remembering past events.
  • Anticipating what is yet to come, which can be exciting and motivating.

This understanding leads to the development of important skills such as communication, logical thinking, and even empathy, as children begin to connect with the experiences of others over time.

Conclusion

In first-grade math, understanding the concept of time through "yesterday," "today," and "tomorrow" is foundational. This helps children organize their experiences and sets the stage for more advanced concepts related to time in the future.

With simple language, lots of examples, and interactive activities, students can make meaningful connections with these concepts, building a strong foundation in their mathematical journey. Whether it's drawing a timeline or discussing daily events, making time tangible and understandable is an important step in learning.


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Understanding Yesterday, Today, and Tomorrow

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