Create a slide or slides for each day's instruction. Insert text, graphics, links, embedded videos, and/or audio. Add new slides at the top of the slide deck, just like in a blog.
as a web page/presentation. Inserted links, audio, and YouTube videos will all play inside the published presentation. When you update the slide presentation it automatically updates the published presentation/web page.
to explain a lesson, help non-readers or EL students, emphasize directions, play a music or sound clip, start a conversation, etc. You cannot, at this time, narrate a Google Slide directly. You can insert sound files you have saved in Google Drive. Online Voice Recorder is a simple tool for recording your voice and it works with Google Slides (go to slide #6 and click on the speaker icon).
for instruction, or even better, for student assignments and projects. And don't forget that students can work collaboratively on these, and add comments and notes (which don't show in Presentation mode). A fun use of Google Slides it to make an animated gif or animated banner.