First, consider your need to deliver content. While you might normally prefer to do this as a lecture, are there other methods that might work, and be easier, given the circumstances? For instance, consider sharing podcasts, articles, youtube videos, and so on in place of a traditional lecture and ask students to write about those. Of course, the University's duPont library is often the best place to start.
If you decide a real-time lecture is best for your material, you can use Zoom. Zoom has screen sharing so students can see your Powerpoint or Google slides (or other documents) in real time. Students can participate in class or ask questions by using the meeting audio or by typing questions into the chat function. Let them know which you prefer before you begin.
Zoom is easy when it works, but recognize that (especially in a time of crisis) you and your students might experience limited connectivity. Be flexible about how students can participate in this virtual environment and be open to new options as they arise. Because of these potential difficulties, we recommend you also record your real-time lectures so students can review them. The record button appears at the bottom of each Zoom session.