Open the activity
Click "Activity settings" in the top right
Use the "Revise" tool to adjust the behavior of the activity.
This can include:
adjusting the reading level (e.g. "speak to the students as if they are 8 years old")
focusing on certain topics (e.g. "stick to international affairs and foreign policy")
having personas (e.g. "talk like a pirate")
changing the language (e.g. "make this in French")
switching the roles of AI activity and student (e.g. "let the student play the role of the person being interviewed")
changing the topic entirely (e.g. "let's talk about WWII instead of the US Civil War")
Click the "Revise" button, and the AI will automatically rewrite settings according to your prompt.
Iterate.
Please feel free to revise the activity's behavior more than once. It may take multiple tries to get the exact desired behavior.