Objective

By the end of this lesson, you will be able to understand and apply basic arithmetic operations such as addition and subtraction in the context of waterfalls.

Materials and Prep

Materials: Paper, pencil

Prior knowledge: Understanding of basic addition and subtraction

Activities

1. Waterfall Addition: Imagine there are 5 waterfalls. Write an addition problem like "2 + 3" to represent the total height of the waterfalls. Solve the problem.

2. Waterfall Subtraction: Now, imagine 7 waterfalls. Write a subtraction problem like "7 - 3" to represent the number of waterfalls left after some have dried up. Solve the problem.

Second Grade Talking Points

• "Waterfalls can be a fun way to learn addition and subtraction. Let's pretend each waterfall is a number and we can add or subtract them just like we do with numbers."
• "When we add the heights of different waterfalls, we get the total height. It's like combining the waterfalls to see how tall they are together."
• "Subtraction helps us understand how many waterfalls are left after some have dried up. It's like taking away the dried-up waterfalls from the total number."