Preparation for GMAT (Graduate Management Assessment Test)

In the Philippines schools (both public and private), when you want to enter school on elementary, secondary level (or high school), or tertiary (college) you need to have taken the each tests which is assessed during the last semester of the senior years or before going to the next level of education. In elementary level, the assessment is call National Elementary Assessment Test (NEAT), in secondary it is called National Secondary Assessment Test (NSAT) to which it was formerly called NCEE. These are the assessments that determine student's knowledge and capability based upon the previous lessons learned and if one is good enough to proceed to the next level. And so on and so forth. And so here in United States, there are different level of student assessments. And I just learn that when you want to proceed taking up graduate management or business program, schools assessed you through GMAT to determine and predict the candidate's ability and skill in such field of interest. With that, candidates or aspiring students tends to review first before examination of either self-review, book review, or attending review classes on GMAT prep so candidates are prepared on the day of examination. Most want to have review classes because it is more comprehensive and detail. With the help of technology, online classes nowadays are accessible to which you have the choice anywhere you want to have the review or class, it's amazing isn't it? Should you like to go to classroom or online classes, you have the choice. So which is which, where you want (if ever) to attend classes, classroom or online?