A lot of people have the problem of getting an assignment and starting to write it straight away. The problem with this is that you do not yet have a clear idea of exactly where your writing is going. You do not yet have a plan.
Researching will provide an insight that is difficult to achieve otherwise. Some people do not enjoy or understand exactly how to research. The following pointers will help:
Once you fully understand the topic you are being marked on you can begin to write.
Until you have begun researching, your writing will all be pointless and often wrong. I like to call this filler or fluff. Your assignments should contain as little fluff as possible and that can only come through research.