Simple Machine Design Evaluation

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Objective

SWBAT self and peer evaluate their simple machine design and identify possible improvements to their design.

Big Idea

The engineering process involves evaluation and reflection on the practicalities of the design. Students will evaluate their own design and that of their peers.

Engage

5 minutes

Teacher Tip: This lesson is designed to be a student led evaluation that focuses on the design of their simple machines from Design your own simple machine lesson. This lesson focuses on SP7, 2 and 1 as the students are evaluating, in writing, their engineered models of simple machines. The are responsible for identifying errors and possible revisions to their machines and the machines of others. 

To start this lesson, students will answer a few questions in their student notes sheet. They will work individually to answer theses.  After 3-4 minutes, I will ask a few students to share their responses with the class.

Which simple machine model did you build?


How did you simple machine help you move the clay from one side of the table to the other?

Explore

10 minutes

During this section, students will work in their small design groups to analyze their own simple machine models.  They will do this by working through the questions below. After 7-8 minutes, students will share their answers. 

Answer the questions below with your small group. Use your simple machine model to help you.

  • Was your machine model successful in completing the task?
  • Why or why not?
  • Is there anything you could do to your machine to make it better and more efficient?
  • Explain what you would do and why.

This writing helps students to address standard SP1, asking questions and defining solutions for engineering.  Students are asking questions about their own design and proposing solutions for potential problems.  

Elaborate

15 minutes

During the next section, students evaluate the model created by another group.  They all answer the same questions about this model as they did about their own. They work with their small group to answer the questions in their notes sheet. 

Answer the questions below with your small group. Use a different group’s simple machine model to help you.

  • Was this machine model successful in completing the task?
  • Why or why not?
  • Is there anything they could do to their machine to make it better and more efficient?
  • Explain what they could do and why.

Evaluate

5 minutes

For the last part of this lesson, students will reflect on the design building and the importance of model creation in science class. To do this, they will answer the following questions independently on their student notes sheet. After 3-4 minutes, students will share their answers with their shoulder partners. 

Answer the questions below in complete sentences.

  • Why is it important to make revisions to your models?
  • What does building models help us to do in science class?
  • Explain 3 things you learned about engineering and design from doing this project.