This is another international certificate. The exam for GRE contains 3 sections: Quantitative reasoning, verbal reasoning, analytical writing. The classes for GRE are held privately because of the number of applicants. These classes last 3-6 months depending on your language proficiency.
Participation in all Online classes of IELTS Club requires a careful analysis of your English proficiency
After you know your proficiency level in English, it is time to go for classes