When I lived in Mexico City, I found a nice niche helping people take the GMAT exam for a major provider of test preparation. Before starting the job I didn’t think much of exam prep, but after going through the trainer and helping people prepare myself, I really saw how important test prep in general and gmat prep in particular was. Getting quality gmat prep was the best way to score well on the exam.
It was unbelievable the gains that students made. Good gmat prep could help a student improve tremendously because they knew what was on the exam and how to properly confront each type of question.
It’s not surprising that I highly recommend people to properly prepare for an exam.