It is amazing how the decisions you make when you are a teenager can impact your life so heavily. You may not think they do, but they definitely can. I would say that everything from sixth grade and up matters for who you will become in your adult life. Elementary school has some impact, but I want to argue that most of the things you do in elementary school are not your fault. You are not fully cognizant of what you do in elementary school; your brain is not quite as developed as it will be in later years.