Judging by the post, some basic grammar and spelling would probably help too. I realize you may be from another country and English is a second (or distant third) language, but Professors may let certain things slide if appropriate attention to detail is given. I've received "bonus" points before, because case studies were neat, accurate and easy to read.
Like 3v0 says, figure out what makes your instructor tick. But more importantly, UNDERSTAND why things work, not just the answer.