There are a number of organizations that rate Business Schools. One such report can be found here: https://www.cnbc.com/2018/09/28/the-10-best-business-schools-in-the-world.html. It's great to want to attend a top school. But also remember that the best school for you and your interests may not be on this or any list. Find the school where you will thrive. The one that fits your personality and needs. One way to find this out through visiting schools OR talking to current students. While challenging, college will be one of the best times of your life and you want to be at a place where you can be most successful. I wish you the best success!