These are technically decent shots, with a distinctive style and a specific subject matter, and they carry some of the emotional weight of that subject matter. I don't think anyone could as for anything more in a documentary project. They hit the assigned target just fine.
There are pretty serious ethical and artistic issues with photographing the homeless, and more generally the oppressed and disadvantaged.
Ethically it's pretty much impossible to do it without being essentially being complicit in their situation. Sure, you didn't make 'em poor and sick, and you even helped out with a bit of food and cash. Good onya. Nonetheless, you are converting their suffering into a grade on a project, and ultimately into part of a degree, which degree will presumably give you advantages in life. No amount of exchanged money or other atonement is going to change that fact. Now, we all oppress one another all the time, so it ain't just you, and you're not a bad person for it. But the issue's there.
The artistic problem is that everyone does this and nothing changes. We have far more pictures of homeless people rattling around out there, making whatever artistic and social statements they make, than we do actual homeless people. Ultimately these pictures don't have any impact any more except to make the viewer say "oh how sad" and -- maybe -- donate a little something to the food bank this year. Art doesn't have to drive social change, but this kind of art is frequently justified as an attempt to drive social change. Often enough that even if you haven't the slightest intention of driving social change, your photographs will tend to be interpreted as an attempt to drive change, an attempt that won't work. Pictures of the sad and ruined faces of the homeless are, whether we like it or not, all citations of one another. They smash together into one giant ethically problematic useless ball of sameness.
All that said, the photos are fine, they do what you were asked to do and they do it well. They just happen to exist in a sort of sticky corner of the world of photography.