Answer:
In the UK students learn British English. American English is not recognised as correct in the UK, though an increasing number of young people use some aspects of American English in everyday speech, because there is a cultural influence from music, TV and film. At school and in exams, however, these words and grammar would be marked incorrect.
The variety of English a learner learns would depend on where they live or are learning English.
If you live or are learning English in Australia you are not going to learn American English and probably not strictly British English either.