Objective

By the end of this lesson, you will be able to apply arithmetic skills to solve mathematical problems related to Legos.

Materials and Prep

• Legos (various sizes and colors)
• Paper and pencil
• Calculator (optional)

No prior knowledge or preparation is required for this lesson.

Activities

1. Counting Bricks: Take a pile of Legos and count the total number of bricks. Write down the number.
2. Addition Tower: Build a tower using Legos. Start with a base of 5 bricks and add 3 bricks on top. Write down the total number of bricks in the tower.
3. Subtraction Challenge: Create two small Lego structures. Count the number of bricks in each structure and subtract the smaller number from the larger number. Write down the difference.
4. Multiplication Arrays: Build a rectangular Lego array with a length of 4 bricks and a width of 6 bricks. Calculate the total number of bricks in the array.
5. Division Dilemma: Divide a larger Lego structure into equal parts. Count the number of bricks in the structure and divide it by 4. Write down the result.

Fourth Grade Talking Points

• "Mathematics is all around us, even in our favorite toys like Legos."
• "Counting is an important skill in math. Let's count the number of Legos in a pile together."
• "Addition helps us combine numbers. How many Legos are there in total when we add two groups together?"
• "Subtraction is useful when we want to find the difference between two quantities. How many Legos do we have left when we take some away?"
• "Multiplication allows us to quickly find the total number of objects in equal groups. How many Legos are there in total when we have rows and columns?"
• "Division helps us share equally. How many Legos does each person get when we divide them into equal parts?"