Post date: Feb 25, 2019 6:39:41 PM
'20 Free Google Slides and PowerPoint Themes for Teachers' (DitchThatTextBook.com)
https://www.slidescarnival.com/category/free-templates
Look at the menu options across the top. For example, these are the 'Inspirational' themes - https://www.slidescarnival.com/category/free-templates/inspirational-presentations
(the 'Ragonize' one has some nice ones if you can use that kind of thing.)
It seems that each one has some 'editable icons' on the last couple of slides.
They are super easy to use. For Google Slides, just 'Make a copy'.