I frequently am asked how to open up more than one students work at a time. While there is no “open all” option in Google Classroom, you can quickly open up multiple student documents at a time.
Clicking on an attachment opens the attachment and shifts the focus from Google Classroom to the student document.
You can prevent the browser from leaving Google Classroom when you click on a document by holding down the Control key. (Hold down the Command key on a Mac). Hold down the control key while you click on the attachments to launch the student documents in new tabs.