Recently I have joined Jamboree institute for GMAT class( weekend batch) . Jamboree provided 4 books each dedicated to specific section.
They helped me go from a 640 to a 770.
They provided me with tricks and methodology that help me get answers of toughest questions.Maths teacher doesn’t bother to explain or correct any different approach than his own. However, material provided is decent especially the blue book. I haven’t taken any of the mock tests yet. It will very much helpful if anyone can shade some light mock tests quality