These tools can enable virtual class meetings (as well as virtual office hours, an exam review session with an instructor or a TA, or even student presentations): simply let your students know when and where to "meet up" virtually.
Run through this "Teaching a Live, Online Session" checklist from OLC for some considerations to keep in mind/check out beforehand, and some resources to take in.
Step-by-step instructions for logging into Zoom, and additional Zoom walk-through information and videos are available on our guide to Zoom.
We have set up a Canvas integration; you will need to enable Zoom in your course menu from the Settings Navigation page. You can then setup meetings that students can access from within your Canvas course.
If a student does not have Internet, but has access to a phone, you could conduct 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.).