Slideshow of Google Classroom Basics
Canva - Digital design software. You can apply for a free teacher account to access the pro version and you can add your students too!
edpuzzle - Awesome way to add comprehension questions to videos. You can use your own videos and questions or use ones already created by others. Links with google classroom!
Pear Deck - Allows you to turn slideshows into interactive lessons that you lead or are student self-paced!