You name it and you have it!
Argumentative writing, Expository, Descriptive and narrative writing.
Report, Emails newspaper reports, articles, Diary writing , story writing keeping in mind expected styles, sentence structures, appropriate register, vocab and other linguistic features.

Writing based on one's innermost experiential knowledge and precise usage to write it down effectively keeping audience in mind.

Practicing past papers and correcting them using reliable marking scheme.

Best writing is one which comes from one's deepest recesses of one's being. It touches every soul, no matter how old, how young, whether male or female. Experience touches everyone.

Context, vocabulary and using various sentence structures can produce A grade students.