The fourth purpose is to determine whether a KLA/topic outcome has been achieved. In an educational sense this is the main purpose of assessment, as the ultimate goal of education is to encourage and facilitate learning.
study skills noun Education (originally US) methods and techniques that aid effective learning, especially viewed as a set of skills that can be acquired or taught; the ability to study effectively.
skill - ability to produce solutions in some problem domain; the skill of a well-trained boxer; the sweet science of pugilism. science. ability, power - possession of the qualities (especially mental qualities) required to do something or get something done; danger heightened his powers of discrimination.