How do you handle leechers aka LAZY STUDENTS in your class?

I’ve come into the nursing profession with the compassion to help people. However, in nursing school, I feel everyone should help each other to a “point”. My current dilemma is that there are a few classmates in my class who are leechers. Unfortunately, they are attracted to me. I am a nice person and love helping people. I’ve made photocopies for people and let people see my notes. These classmates had valid reasons (i.e. sick or computer problems). I’m okay with that.