Originally Answered: Can anyone tell me about teaching GAC. Global assessment English in China. I am a TEFL Teacher?
According to the ACT website, "The GAC is a university preparation program that provides students with the academic knowledge, independent learning skills, English language skills and confidence to enter and successfully complete a bachelor’s degree at university. "
That is, the program should be similar to that of Intensive English Programs offered by many universities for students who want to develop sufficient English to study in a university. That's quite different from what you've been doing. It means you would be teaching reading and writing, and at a much higher academic level. Students are going to need advanced grammar such as conditionals and passive verbs. They will need instruction in writing essays, including organizational patterns and strategies for cohesion.
In any reputable program, you would have papers to grade and feedback to give on assignments. But in any responsible program, you would NOT have 2000 students. This sounds like a real scam to get students to pay, and then give them very little for their money.
Just to contract in intensive programs in the States, teachers typically have classes of 15-20 students. They might have 4 classes a day, so that they meet with a total of 60-80 students a week. They would be able to organize small group work in the classes and be able to monitor 4 or 5 groups while working in class. They would give feedback on at least one writing assignment a week, and check other homework assignments. You would NOT be able to do that with 2000 students. No program that had teachers responsible for more than 100-150 students a week would ever be accredited.