If you’re creating a slideshow in Google Slides, you can find some more interesting templates than those built into Slides. To do so, go to Slides Carnival. Once you find a slideshow style that you like, you can make a copy of it, and then edit it as desired. Remember, that if you like the way a slide looks, you can always make a copy of it (make sure that you have permission), and then edit the copy.
Check out Slides Carnival for your own use, and share it with colleagues and students who use G Suite for Education. The tool works both on tablets and smart phones, as well as on laptops/desktops.