Kami is an online document annotation and markup tool. You can highlight, underline, and strike through text in PDF and other document formats. You can also add text boxes, shapes, and images. Kami works with Google Drive and Google Classroom.
This is a great resource you should take advantage of especially if you are use PDF's in your Google Classroom. When you signup all you have to do is use your Collier email address, and it will give you our license and all the benefits.