Service Alert
The following options could be used for students without Internet access.
If a student does not have Internet, but has access to a phone, you could cover coursework with them via the phone.
Students can also call in to many video conferencing meetings (including via Google Meet/Hangouts and Zoom) by phone, using the phone number provided. You would just need to verbally describe things you share on the screen (presentations, etc.).
If need be, you could conduct coursework by mail, like a correspondence course; you could send resources to students, and they could send responses back to you.