Moodle has a new Activity/Resource called PDF Annotation:

What is the PDF Annotation tool?
The PDF Annotation tool in Moodle allows you to upload a PDF file for students to add text-based comments for their peers, draw on the document, write personal notes for themselves, and write private comments to the instructor.

Why use it?
This tools provides students with a way to analyze specific course material with their peers. Students can post comments and questions directly to the PDF resource where they can see their peer’s interpretations of the course material too. This helps broaden their understanding of the content through social learning.


