Let's invite the next class to show their ppt.

Come on, let's take a look at the PPT demonstration in the next class.

In addition, the next class can mention the general content or theme of PPT, such as "going out for a picnic" You can say: I don't know if students like hiking, but safety is a concern of parents. So what are the precautions for going out for a picnic? Next class will introduce us (next class will tell us how to travel safely through PPT), please come next class,