In high school I was always told when writing an academic essay to stay away from first person point of view, whereas in college you're taught the complete opposite. "The main reason most teachers give for the discipline of I-less-ness is that it keeps your writing “objective.” They want to make sure that you don’t rely on personal experiences or perspectives where you should be providing concrete, researched support for your arguments" (Maddalena 181).
The idea that your academic paper should always be five paragraphs was also instilled in me during high school, but in college you're taught that writing five paragraphs doesn't necessarily give you a successful academic paper.