**Course Title:** Introduction to Programming with Scratch **Section Title:** Debugging and Troubleshooting Scratch Projects **Topic:** Debug a broken Scratch project and fix logical errors. **Lab Objective:** By the end of this lab, you will be able to debug and fix logical errors in a broken Scratch project. **Lab Overview:** In this lab, we will guide you through the process of debugging a broken Scratch project. You will learn how to identify logical errors, use the Scratch editor's debugging tools, and apply problem-solving strategies to fix common issues. This lab is essential for anyone looking to develop problem-solving skills and master debugging techniques in Scratch. **Step 1: Download the Broken Project** To begin, download the broken Scratch project from this link: [Insert link to the broken project]. This project is designed to simulate common errors that you may encounter in your own projects. Save the project to your computer and open it in the Scratch editor. **Step 2: Understand the Project** Take some time to familiarize yourself with the broken project. Read through the code, examine the sprites and their behaviors, and try to understand what the project is supposed to do. You can also test the project to see what errors occur. **Step 3: Identify the Errors** Using your understanding of the project, identify the errors that are causing the project to malfunction. Ask yourself the following questions: * What is the project supposed to do? * Where do the errors occur? * What are the symptoms of the errors? Make a list of the errors you've identified and prioritize them. In this lab, we will focus on logical errors only. **Step 4: Use Debugging Techniques** To fix the logical errors in the project, we will use the following debugging techniques: 1. **Read the Code Carefully**: Read through the code line by line, paying close attention to conditionals, loops, and variables. 2. **Use Print Statements**: Add print statements to the code to output values and see how they change as the project runs. 3. **Test Small Sections of Code**: Test small sections of code in isolation to see if they work as expected. 4. **Check Initialization**: Check that variables and sprites are initialized correctly. Apply these techniques to the errors you identified in Step 3. **Step 5: Fix the Errors** Using the debugging techniques from Step 4, fix the logical errors in the project. Start with the highest-priority error and work your way down. **Step 6: Test the Project** Once you've fixed the errors, test the project thoroughly to ensure that it works as expected. **Common Logical Errors in Scratch** Here are some common logical errors to look out for in Scratch projects: 1. **Infinite Loops**: Loops that run indefinitely can cause Scratch to freeze or crash. 2. **Unintended Conditional Statements**: Conditionals that evaluate to the wrong value can cause projects to behave erratically. 3. **Uninitialized Variables**: Variables that are not initialized correctly can cause errors. **Best Practices for Debugging in Scratch** Here are some best practices to keep in mind when debugging in Scratch: 1. **Keep Code Organized**: Use comments and labels to keep code organized and easy to read. 2. **Test Small Sections of Code**: Test small sections of code in isolation to identify errors quickly. 3. **Use Debugging Tools**: Use the Scratch editor's debugging tools, such as print statements and variable inspectors. 4. **Check Online Resources**: Check online resources, such as the Scratch documentation and community forums. **Conclusion** In this lab, we walked through the process of debugging a broken Scratch project and fixing logical errors. By following these steps and applying debugging techniques, you can identify and fix common errors in your own Scratch projects. **External Resources** * Scratch documentation: [https://en.scratch-wiki.info/wiki/](https://en.scratch-wiki.info/wiki/) * Scratch community forums: [https://scratch.mit.edu/discuss/](https://scratch.mit.edu/discuss/) **What Next?** In our next topic, we will cover "Brainstorming and planning the final project" from the "Final Project: Build Your Own Game or Story" section. **Call to Action** Leave a comment below if you have any questions or need help with this topic. Share your own debugging experiences or tips for fixing logical errors in Scratch projects. After completing this lab, review the content and test your understanding by answering the following questions: 1. What is the first step in debugging a broken Scratch project? 2. How do you use print statements to debug code in Scratch? 3. What is a common logical error in Scratch, and how can you fix it? If you have any questions or need help, don't hesitate to ask. Good luck with your Scratch projects!