The rapid growth in science and technology has affected societies and change has become inavitable in a short time. Human profile in our society has changed as a result of this growth. From this point of view, nowadays the aim of education is defined as training individuals who can meet the needs of the society and who are appropriate to the information era. In accordance with these developments, the Ministry of Education in our country started to deal with instructional programmes and improve them using a new approache. These new instructional programmes are based on training people by the way of active participation of the students in teaching-learning process. Thus, students will be able to reach the information they need, use it for their purposes and share it with interested parties. Furthermore measurement and evaluation system has been also changed according to the new programme. In this new approach students have an active role in the assessment process; individual differences are always considered and the parents are informed about the students' progress in each stage. Therefore, using methods such as portfolio assessment, performance assessment, self-assessment, peer assessment and also assessment tools such as rubrics, projects, concept mapping have become compulsory. Within this framework in this article, the concept of performance will be explained briefly and rubric as a prominent assessment tool will be discussed thoroughly. Rubric is an assessment tool that lists the criteria for a piece of work, or "what counts", it also articulates gradations of quality for each criterion, from excellent to poor. In rubric the assessment standards are given to the students before starting their study so that they know on which basis their performance would be evaluated. Sharing of all these information with parents and students would help what is expected from student work in a concrete way. Thus, parents and students will be equipped with detailed information about expectations and assessment standarts.