I'm not going to help a student who needs it.
If you're a teacher, isn't it your job to help them? Why wouldn't you?
Yeah, I'm a teacher, but I don't feel like it.
As a teacher, it's your responsibility to help students. If you are unable to help them, then you should talk to someone at the school who may be able to find them the help they need to succeed.
That might be a good idea.
I hope you follow through! Schools are always willing to try to get the help to students who need it. If you bring it to their attention, I'm sure you can work with the school and the student to find a way to get through to them.