Ineed .. is this a good thesis statement?
harper demonstrates courage in this novel by using people such as boo radley, atticus finch, and mrs.dubose.
can you give me pointers to make this better?

You should make it more specific. Try to include how they demonstrate courage. Also, is it possible to show that just one person is showing courage, rather than all 3? Other than that, I think you’re headed towards the right path. :)

On the month of March 26, 1960 the great Sharpeville Massacre took place creating triggered mass underground as well as resistance, and as international solidarity demonstrations. This major event is the biggest impact for making white South Africans aware of their surroundings when political blacks were being suppressed.  

Explanation: