Anne, there are always challenges when bringing knowledge to the masses. Does not matter if you are teaching to a group of privileged and resource rich students or a group of students that may not have had access to as many resources or learning opportunities as may be the case with others. The challenges may differ but there are challenges none the less. The focus as an instructor is to understand your students, get to know them and build relationships so when opportunities exist to take advantage of a teachable moment. An effective instructor can also take full advantage of good relationship building to build trust and rapport with students which can ease the tension of test taking. Regards, James Jackson