Education is not a word, it is a world by itself, and each point that can be listed under this word is a field where you can spend your life trying to cover all its part and never reach that point. It is not something that you can learn in several years and stop. In education there is always something to know, something to improve, something to advocate, work for, and reach it like any other science or domain.
Some people think that as long as they have knowledge about a certain substance, they can enter any class and be teachers. Teaching is much more than that and they need to improve themselves as teacher in each step and each part of it. One important part of teaching is assessment. We may not be aware that an assessment tool may or may not reflect the real level of the students but it certainly reflects the level of the teacher who crafted or used the assessment tool.
If you search for the meaning of educational assessment in different sources, you will find that it is defined as documenting students according to their knowledge, skills, altitudes, and their beliefs in measurable terms. Students usually give a great concern for the results of educational assessment, they evaluate themselves based on the results of the assessment, and these results in sometimes may decide the life path of the students. All these points explain clearly the responsibilities that the teachers should be aware of while crafting an assessment tool and while interpreting the results. Here comes the word validity, which is defined as the soundness of the interpretation and the uses of student’s assessment results. In order to assign grades fairly for the students based on a classroom assessment the validity of the scores, must be improved depending on clear criteria and evidences.
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