To score well in 'To Kill a Mockingbird', do the
following:
1) Understand the concepts of 'Racism', 'Slavery', 'Black and white
stereotypes' and be able to explain and give examples in your
answers
2) Include the elements of 'family', 'change of perception of adult
world by children while growing up' and how the society progress in
terms of perception of societal outcasts.
3) Draw parallels and differences to actual real life events that
you have encountered (be it overseas stay or trips or local
encounters of racism) to add bonus to your essay.
4) Conclude on an upbeat note of how these kinds of racial views
are fading with globalisation, more cultural exchange between
countries etc.
Sure to score A1 if you follow the above steps.