What is Kami?
This extension will allow students to create text boxes and type on a PDF document. With Kami, teachers can share PDF files with students, and students can annotate the PDF files via mouse, trackpad, or keyboard using several different features, including Highlight, Text Box, Draw On, Add Shapes, and more. Users can either upload PDF files from their computer or from Google Drive. Kami automatically saves all files as they're uploaded, so this is a great option for teachers who want to go paperless.
Just FYI...certain features do not work on a tablet, such as moving the text boxes, highlighting phrases, or changing colors. In the basic version, teachers can send or embed a link enabling students to annotate a document, or they can save PDFs for students to access in Google Drive.
How do students and teachers add it to Chrome?
If you are going to use this with Google Classroom, make sure that you create a copy of the pdf for each student in the dropdown before assigning, or they will all be typing on your original pdf.
Since full integration with Google classroom is a paid-for item, do not fear it can still be used.