This is a very short video going over the basics:
Introducing ✨Scratching the Surface,✨ a series of one-minute tutorials where Scratch Team members cover intermediate coding concepts in Scratch.
To kick us off, we’re learning about grids. Have a look! pic.twitter.com/SWmdD6g84x
— Scratch Team (@scratch) April 6, 2023
And here is a tutorial on making a game to help with coordinates and negative numbers. You could work with a partner, show the tutorial on one iPad and code on the other or borrow an iPad from someone who is not using it.