@ Babalaas- If you are a good note taker and you have large classes you can make a decent amount of money selling notes and study guides. It is perfectly legit, and most Universities actually ask students to take notes to submit for each class. This is a good way to supplement college grants and scholarships.
Sites like study blue and notehall pay students for every study guide or set of lecture notes that students buy. If you take good notes, it is easy to get a good rating, thus more sales.
I had a few lectures last semester that had between 200-400 students. One of those classes had three exams including the final. I got $2.00 for every study guide sold. I would just send a mass email to all of the students in my class once I posted a study guide and I would have fifty or more buyers in days. I made over $250 just on that class, and I submitted notes for three of my five classes. This can be a good way to make a thousand or so a year, and make better grades while doing it.