Erin,
This sounds great! Parents, as well as students, need to know the basics of using Google Classroom. I look forward to using the guides with my parents/students when they are available. Perhaps you could include how to put their Google Classrooms on their bookmarks bar, so that when they click on the specific link, then they go to the Classwork page. I hope the guides are available as pdf, slides, and/or video.
Shirley