After students watch the video and before practicing, come together for a whole-class discussion. Use student answers to the questions provided as the basis for discussion.

As students discuss the difference between repeating code with a Repeat block and a Forever block, it is important to keep in mind that there is not one “right” answer when it comes to coding the robot to complete a task. Encourage students to think critically about the reasoning behind their coding choices. The Toolbox in VEXcode AIM is just that - a set of tools - and students should be encouraged to explore and test to find the right tool for the job at hand.

To learn more about the blocks in the Logic category of the Toolbox, view the VEXcode API Reference - Logic - Controls.

Remind students of shared expectations for collaborative coding and discussions before beginning.

Distribute the Lesson 2 task card (Google / .docx / .pdf) to each student. Students will use the same task card for the whole activity. They should first plan their projects with their groups, then check in with you to share their plans before beginning to code. Remind students that they can use comments to incorporate their project plans directly into their VEXcode projects.

Students can use the project they created in the previous lesson as the basis for this one. If students are using an existing project, remind them to use the Save As option in the File menu of VEXcode, so that they keep both projects separate. Learn more about saving and opening projects in this article.

As students are building and testing their projects, circulate around the room and engage in discussions about their process and progress. Ask questions like:

• What behaviors have you coded so far? What is your next step?
• How are you using AI Vision in this project? What have you learned about AI Vision that is helping you to be successful here?
• What behaviors do you think you will need to repeat? How will you do that? 
• How are you commenting your code to help you organize your project? Would your comments help someone else understand why the blocks are in your project? Why or why not?

If students are struggling with what to iterate on, encourage them to think creatively about the reactions they are coding. How can they apply things like custom images or actions to help make their reactions clearer or more expressive?

Guide students to share their learning in a whole-class discussion. Help students reflect on their learning through practice to converge on shared understandings or learning targets.

Use the questions students answered in their journals as the starting point for the discussion. Ask follow-up questions to guide student understanding: 

• On repeating behaviors: 
  • Can you think of a previous project from the course where you would have made a different choice than you did here? Why? 
  • What are the advantages of using a loop to repeat code? Are there disadvantages? Why or why not? 
• On challenges and collaboration: 
  • What resources have you used to help you figure something out or answer a question? What was the most helpful to you? Why? 
  • If you had a new partner, how would you apply what you've learned about collaborative coding to make you successful? 
  • What are some problem solving strategies that you've learned that help you overcome obstacles?