Kami: With Kami, teachers can share PDF files with students, and students can annotate the files via track pad or keyboard shortcuts using several different features, including Highlight, Add Text, Draw On, Add Shapes, and more. Users can either upload PDF files from their computer or from Google Drive, or create blank documents or assignments via Google Classroom (with the paid plan). Kami automatically saves all files as they're uploaded, so this is a great option for teachers who want to go paperless. Teachers can also merge PDF files so that students can work with multiple files on one screen.
Kami & Google Classroom for Students