Thank you all for your input. You know, it's not that I don't understand what it entails, rather I'm baffled by the comments on some parts that I explain to my classes on daily basis. Grammar for instance, they gave me in the interview these two sentences:
1) She studied English last year.
2) She's been studying English for five years.
I explained the two sentences under pressure (I get anxiety in interviews), so it didn't come out the way expected from a teacher. This is another thing I want to tackle, it also used to happen in my IGCSE exams. I used to prepare well, even get good grades in my mocks, but in the real thing my brain goes blank.
If God wills, I'm going to take the IELTS exam, but I need to refine the areas of weakness I've got. That's why I'm here. Thank you again for the help.

English Teacher