Google Slides is a wonderful tool to use with students for presentations. However the selection of created templates is rather limited. You can of course go to the plethora of templates @ Google Templates however they tend to be more of the same. Slides Carnival has created professional looking templates that are very easy to use. A few clicks are you are on your way to a professional looking presentation with all the unique slides many have expected from Microsoft Powerpoint. In all my research the presentations remain totally free.