Google Docs has a great feature called "Horizontal Line." Now you can quickly insert response lines with out having to hold down shift and the dash. After you get a few lines, copy and paste.
When working on a shared Doc (slide and sheets), instead of sharing the Doc again, simple email the collaborators right from your Google Doc.
When working in Docs, once you activate the header and footer, they are challenging to get rid of. This video will show you how to remove the Header and/or Footer
Insert tables into your Google doc for students to type their answers in.