Best platforms for creating student workbooks

Hi all! I’m hoping to draw on your collective wisdom. I am creating a digital workbook to include in my open course. I want to have a single place that students can go to collect their research and complete activities throughout the course.

What are the best platforms for creating the workbook?

I’ve been looking at Canva (then saving it as a PDF) or Google Slides. Are there others I should consider?

Feel free to share any great examples of workbooks you’ve created or seen as well.