@jschulman I know that it might not be ideal, but I would recommend reaching out to your school’s IT administrator or whoever has the ability to provision apps across your domain. Unfortunately the changes that Google made mean that your school administrator has to review and reaccept the permissions similarly to what they would have done when you first began using SketchUp for Schools. Although it is important to note that they’ll now need to do it through the Google Marketplace at the link we provided here: SketchUp for Schools Login Changes for G Suite Users - #18 by Steve_Ketchup
Once your administrator has completed the steps outlined in that post, both you and your students should be able to log in again directly at edu.sketchup.com without downloading or installing anything else.