From a spreadsheet template, fill in names and email addresses for students and run the addon "folder maker." Folders are created for every student and they are automatically shared with the teacher and student. Awesome!
"Students and teachers can login to the DocHub app (or DocHub.com) using their Google account. From there, it is possible to upload any PDF, text document, or Microsoft Office file from Drive, the web, or even your computer/Chromebook download folder. Once a document had been uploaded, students can highlight, draw, insert text boxes, and even incorporate sticky notes. These annotated PDFs can then be sent to Drive or even shared with a link. Unlike some other web-based annotation tools, all of the annotations remain with the PDF after it has been sent to Drive though the sticky notes only appear when shared with a link."