How do I know when I am providing "accommodations" or when I am over accommodating or going too far?

An accommodation letter generated from Disabilities Services will list required accommodations. You should not change the curriculum of the course or modify assignments to alter the core requirements. For example, changes in test formats or giving extended time or advanced notice to a student would not be altering the requirement of learning course material, and therefore are within reason. If you feel uncomfortable with an adjustment request, discuss it with Disabilities Services staff.