If you want to add a Google Slides presentation to a lesson, you can do this using an embed code.
First, open the presentation you want to add, go to File in the top menu, then select Share → Publish to the web:
Go to the Embed tab and click Publish:
Copy the embed code that appears:
Next, return to your lesson, click the plus icon (Quick Insert), and select “Add Embed”:
Paste the copied code and press Enter. The presentation will appear in the lesson.
Don’t forget to click Save to ensure your changes are preserved.
