Objective

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

Materials and Prep

• Legos (various sizes and colors)
• Paper and pencil
• Number cards (0-9)
• Counting manipulatives (optional)

No prior knowledge or preparation is required for this lesson.

Activities

1. Building Number Towers:

   • Choose a number card (e.g., 5).
   • Build a tower using Legos, with each Lego representing a unit of the chosen number (e.g., 5 Legos high).
   • Repeat with different number cards to practice building towers of different heights.

2. Addition and Subtraction Challenges:

   • Create a simple addition or subtraction problem using Legos (e.g., 2 + 3 = ?).
   • Build the corresponding number towers for each addend or minuend.
   • Combine or remove Legos to find the solution.
   • Repeat with different problems to practice addition and subtraction skills.

3. Pattern Creation:

   • Use different colored Legos to create a pattern (e.g., red, blue, red, blue).
   • Extend the pattern by adding more Legos following the same pattern rule.
   • Identify the number of Legos used for each color and discuss the pattern rule (e.g., "We used 2 red Legos and 2 blue Legos. The pattern rule is to alternate between red and blue").

Second Grade Talking Points

• "Today, we are going to learn about arithmetic using Legos."
• "Arithmetic is a branch of mathematics that deals with numbers and their operations like addition and subtraction."
• "We can use Legos to help us understand and solve arithmetic problems."
• "We will build number towers with Legos to represent different numbers."
• "By adding or removing Legos, we can solve addition and subtraction problems."
• "We can also use Legos to create and extend patterns."
• "Patterns help us recognize and predict sequences of numbers or objects."
• "Let's have fun exploring arithmetic concepts with Legos!"