Fashion designing is a very vast subject. If you want to get into the details of understanding fashion they the best way you can go about is to buy a good fashion designers book. These books give you a lot of detailed information on various aspects of designer's creations and style besides helping you get more ideas of your own too.
You will not only learn by seeing others work, but over a period of time be able to define your own style statement and be able to focus on which fashion trend you wish to follow.
These books will teach you a lot of about trends and concepts besides showcasing others work. Over a period of time you will be able to start identifying yourself with a particular genre and define your own art and design.
The best fashion magazines in the industry are highly priced and worth it too. But then if you are a student, you may not be able to afford to buy them. The best way for you would be to buy the magazines at seconds shops or garage sale where they sell the old magazines at cheap rates.
If you are a very serious student wanting to make a profession in fashion designing, you might want to look for more reference oriented and technical books that deal with the subject in depth.
You can look for the books referred by the teachers and top designers to their students and buy them for your own reference.
When you have bought these books, treasure them and maintain them well enough to last you a lifetime. They may not be available again in the bookshops.
It helps to keep these books stored neatly and well for time and again you will go back to refer something in the book all through your professional life.