I've been browsing the forum as an outsider for months now, answering questions for fun whenever I'm just sitting around. While it's obviously contingent on many things, my plan is to apply to business school in 5 years. That being said, I plan to take the GMAT in 2 years (at the end of my undergrad or just prior to it).
I was thinking about starting to prepare now. I don't intend to go at it very hard for another year, but I could at least familiarize myself with the structure, questions and format. So I was curious, how much does the GMAT change from year to year? Would it be worth doing practice tests based on the current content, or will that have changed significantly in a two year period?