>Perhaps if you used it to summarize work that you created?

I would want my students to learn and practice how to summarize work on their own.

The only good reason I can think of would be in the context of mass summaries. Chatgpt would be good at creating many summaries all at once. It's scalable. As an experimental tool or to show examples and patterns. I can't see any justifiable uses for students in a typical classroom, and certainly not for submitting work on behalf of the student, instead of the student writing it themselves.

> I can't see trusting it as a source for information since it doesn't provide sources to where it has learned information, at least by default.

I wouldn't trust it, at all. It's not just the source information. Even if it pulled from good sources, it doesn't perform any comprehension or logic or reasoning of the content. The way it works is through a language model. It arranges words together much like a glorified auto complete does. It doesn't check to see whether what it wrote is coherent or correct.