The best investment banking school is one that produces a large number of analysts and has a huge alumni network in the finance industry. These are usually referred to by the term target schools and bulge bracket banks that have analyst positions available in their programs for students from these schools.
In terms of particular schools, Ivy league schools like Harvard and Yale are one of the most admired for their capacity to produce investment bankers (although this is an oversimplification). Other top-ranked schools include Wharton at the University of Pennsylvania; Booth at Chicago; Stern at NYU; Kellogg at Northwestern; Darden at UVA and Fuqua at Duke. Other prestigious colleges such as Imperial College London and New York City’s Baruch College are also on the list.
You can enroll in the Wall Street Prep course, which is used by numerous investment banks to train new employees. This course is excellent and covers a lot of fundamentals of IB. It is an excellent choice for those who are planning to venture into best virtual data rooms business or want to improve their chances of success.
If you have the time, it’s also available on Edx. If you aren’t able to devote to an in depth course, it might be better to focus on getting some experience working on deals and financial modeling, maybe through internships.