Objective

By the end of this lesson, you will be able to understand and apply the concepts of looking for tens, addition of larger numbers, subtracting up to 10, subtracting up to 10 (using hands), difference between two groups, how many more?, and subtracting up to 20 in arithmetic.

Materials and Prep

• Computer or tablet with internet access
• Maths online program (provide details on how to access it)

Activities

1. Start by logging into the maths online program using your username and password.
2. Complete the "Looking for Tens" activity, where you will identify and count groups of ten objects.
3. Move on to the "Addition of Larger Numbers" activity, where you will practice adding two-digit numbers together.
4. Next, try the "Subtracting up to 10" activity, where you will subtract numbers within the range of 1 to 10.
5. After that, engage in the "Subtracting up to 10 (Using Hands)" activity, where you will use your hands to visualize and solve subtraction problems.
6. Proceed to the "Difference Between Two Groups" activity, where you will compare two groups of objects and determine the difference between them.
7. Explore the "How Many More?" activity, where you will find the difference in quantities between two groups.
8. Finally, complete the "Subtracting up to 20" activity, where you will practice subtracting numbers within the range of 1 to 20.

First Grade Talking Points

• "Looking for Tens": Let's count the objects together. Can you see any groups of ten objects? How many groups of ten are there?
• "Addition of Larger Numbers": We have two-digit numbers now. To add them together, we need to start from the right and carry any extra tens to the left.
• "Subtracting up to 10": We are subtracting numbers within 1 to 10. Remember, when we subtract, we take away or remove some objects.
• "Subtracting up to 10 (Using Hands)": Imagine you have 10 fingers. If you want to subtract 5, how many fingers will be left? Count them on your hands.
• "Difference Between Two Groups": Let's compare the number of objects in each group. How many more objects are there in one group compared to the other?
• "How Many More?": We have two groups of objects. Can you tell me how many more objects are there in one group than the other?
• "Subtracting up to 20": Now we can subtract numbers within 1 to 20. Remember, we are taking away or removing some objects or numbers.