In my previous post I shared directions for using Formative to add questions to PDFs. Another option is to use Google Drive to add questions and comments to PDFs. 

Adding comments to PDFs in Google Drive is one of those little features that is quite handy but is often overlooked. To add a comment to a PDF in Google Drive simply open the PDF in Drive (after you’ve uploaded it) and the click on the comment icon in the upper-right corner of the screen. Anyone that you share the file with will be able to see your comments and respond to them (provided you allow commenting). Watch this short video to see how you can use Google Drive to add questions and comments to PDFs. 

Applications for Education

In the video above I used the commenting feature to add a question to a PDF copy of a primary source document (a letter from Abigail Adams to John Adams). I did that as a means to spark discussion and research by students. Of course, you could also just use the commenting feature to give feedback on a PDF that students share with you.