Google Slides now has a Grid (Slide Sorter) view

Here's a nice new addition to Google Slides-- you can now view your slides in a grid view (like"Slide Sorter" in Powerpoint).  Just click on the icon on the lower left of the screen and your slides will show up in a grid, like so:

In grid view, you can move slides around or select a group of slides to apply a transition to, etc.

Here's another idea--I just read a post about a teacher  who using grid view with her students.  Each student has one slide in a presentation. By viewing the presentation in grid view, the teacher can see the progress each student is making.