This document discusses assessment in education. It defines assessment as a systematic process for measuring a learner's progress against defined criteria to make a judgment about their level of achievement. The key purposes of assessment are to enhance student learning and provide feedback to both teachers and students. There are three main types of assessment: diagnostic to identify strengths and weaknesses, summative to evaluate learning at the end, and formative which provides ongoing feedback during learning. For assessment to be effective, it should have validity, reliability, positively impact education, be acceptable, practical, and cost-effective according to the utility formula.