This document discusses assessment in curriculum design. It outlines various types of assessment including placement assessment, observation of learning, short-term and long-term achievement assessment, diagnostic assessment, and proficiency assessment. It also discusses approaches to assessment including validity, reliability, and practicality. Validity refers to a test measuring what it is supposed to measure. Reliability means a test produces consistent results. Practicality refers to a test being feasible to administer within constraints like time and resources.