It seems like you've put in the effort to explain things easily. I'm enjoying the content. [Sharing with other students] I'm still learning, but here's the URL for the 3x upgrade. It tells you which functions have changed in the new version. https://docs.cocos.com/creator/3.8/manual/en/release-notes/upgrade-guide-v3.0.html Teacher, it would be really helpful if you could create a Google Doc with at least the functions used in the lecture, showing how to upgrade them in an A -> B format, and share it with us. 😭😭