Some of the best GMAT teachers available online include instructors from platforms like Menlo Coaching, Target Test Prep, GMAT Ninja, e-GMAT, Magoosh, Kaplan, and Manhattan Prep. Their teaching methods are effective because they combine expert guidance from 99th percentile tutors, structured and data-driven curricula, targeted strategies for each GMAT section, and interactive video lessons. These approaches help students build strong foundational skills, practice efficiently, and develop effective problem-solving and time-management strategies, making online preparation both flexible and results-oriented.