Big Changes at Trinity High is the fourth novel in the Trinity High series.

Trinity High School is undergoing changes that are both challenging and heartbreaking. Naa Atswei, now a form three girl, no longer has to worry about the seniors – she is now one of them. What she and her mates do not know is that, in a strange twist of fate, they now have to worry about the juniors! These new ninos are not only atypical, but are united with one resolve – wage war on all seniors!