The schools always say they want students to develop critical thinking skills rather just being taught to take tests.One way to do this without changing the curriculum would be test court.Most tests accept just one answer as correct.A student with innovative thinking or cultural literacy might find numerous answers that were correct.The student could dispute their grade in test court.They would make their case before a panel of students and teachers.If a student made a convincing argument on why their chosen answer was right, their grade would be changed in their favor.
This could also sharpen debating and public speaking skills.