This document discusses key concepts related to assessment, evaluation, measurement, and their purposes. It defines data, information, and knowledge, explaining how they relate. It then discusses how assessment applies to learners to determine their acquired skills and knowledge, while evaluation typically applies to programs to determine their merit. Measurement determines the attributes of what is being studied. The document provides examples of assessing learning versus assessing for learning. It emphasizes the importance of setting learning goals and using assessment to promote learning.