This guide will show you how to do scrolling for sprites. Scrolling can be a little complicated, but if you read carefully, and understand what is written, then it should be very simple. The same technique is used to make higher level games like 3D and pen platformers. So I thought that scrolling was a good place to start.
This package is a great resource to have your students follow. These game mechanic guides are great to teach specific techniques and skills that can be used to create a game. They allow the students to expand their knowledge of Scratch. It is recommended that your students have an understanding of Scratch before using this resource.