Lesson Plans SET A for Grades 3-4-PDF Lesson 8- Level 3-4- Working Backwards- Presentation

PDF Lesson 8- Level 3-4- Working Backwards- Presentation

Pdf Summary

Lesson 8 of the Math Kangaroo Class for Level 3-4 focuses on the problem-solving strategy of "Working Backwards." This lesson aims to help students apply this strategy for solving problems by tracing actions in reverse to find initial conditions. The lesson begins with a warm-up exercise involving map navigation, which helps students visualize how reversing steps can lead back to the starting point.<br /><br />The lesson highlights several key components of the working backwards approach, including the importance of understanding the final outcome and methodically reversing each step to deduce the initial state. Using tools like flow charts can be beneficial in keeping track of these steps. A crucial part of the lesson is verifying solutions by moving forward again to ensure the solution is correct.<br /><br />The class involves various problems encouraging students to apply this strategy, such as determining the original number of items before a series of divisions, solving currency accounting after sales, and unraveling sequential changes in seating arrangements or number formulations. These problems originate from Math Kangaroo competitions from different years, like Sally's candy problem, Peta Rabbit's carrot countdown, and Ms. Florentina's egg sales puzzle.<br /><br />The lesson also includes an "exit ticket" session where students reflect on the utility and challenges of the working backward strategy, and a "Genius Hour" where they are encouraged to create their own problems and participate in peer feedback. Optional homework consists of solving the Math Kangaroo exam from 2020, reinforcing the skills learned. The lesson wraps up with a bonus question to further challenge students.

Keywords

Math Kangaroo

Working Backwards

problem-solving

initial conditions

flow charts

Math competition

Sally's candy problem

Peta Rabbit's carrot countdown

Ms. Florentina's egg sales

Genius Hour