Supriusman2014-02-062014-02-062014-02-06wahyu sari yenihttps://repository.unri.ac.id/handle/123456789/5532Measurement and assessment are two key words which have a very important role to play to help teachers indicate whether or not students have been successful in teaching and learning process. Both measurement and assessment have different characteristics. Assessment of students' language skill can be lsrown when measurement has been conducted. According to the teachers and lecfurers law No. 74,2005, one of main duties of professional teachers is the ability of the teachers to assess their students. However, to assess students objectively needs adequate experience, understanding, knowledge and skill on assessment to avoid and reduce subjectivity in assessing receptive and productive skills, in particular writing skill. This paper describes how to assess writing skill, definitions of measurement and assessment, the characteristics of measurement and assessment, the purposes of assessment. Two types of assessment; traditional and alternative assessment are also described to increase especially teachers' insight in this topic.enmeasurementassessmentUR-Scientific Work Lecturer