
In this chapter, Wiggins and McTighe explain how important is for teachers to use criteria when they assess students in the classroom. Evaluating learners’ results is important for their learning. However, what is needed to assess is not just their knowledge, but also how they apply what they know in context. For example, it is different to evaluate activities with one correct answer and assessing open-questions activities. According to Wiggins, “clear and appropriate criteria specify what we should look at to determine the degree of understanding and serve us in making a judgement-based process consistent and fair” (Wiggins, 172), what is to say that teachers must be aware of what are the most important points they need to consider in students’ assessment.
The most complex issue in assessing students is when teachers evaluate not just items of yes or not questions, like multiple choice, but assessing students performance that can be demostrated in quiestions that evaluates real comprehension, quality or proficiency in a certain topic. In order to organize what to assess, teachers need to follow a rubric. This is defined as a
“criterion based scoring guide consisting of a fixed measurement scale [...] and descriptions of the characteristics for each score point”(Wiggins, 173), therefore this rubric will evaluate and determine which points are the student’s strenghts and weaknesses.
In this chapter it is also emphazised the concept of validity, now as a challenge within the classroom. As we know, the validity allows the teacher to determine how are students performing in the clase by basing in the scores. It also determine how effective the contents were for students understanding. However, teachers have to relate that evidence they get from the students with teachers’ criteria. Teachers need to interpretate how well students understood the lesson very carefully which makes validity a challenging issue. Besides, teachers need to be aware of how his lessons, activities or tests assessment will measure what is needed to evaluate in terms of students’ understanding.
Therefore we can conclude that developing an appropriate criteria is important for teachers to evaluate students performance by following the most important points which are organized in a evaluative rubric. Besides the concept of critaria can not be separated from the concept of validity, because in order to interpretate students understanding teachers must be aware of how effective the content was in comparison to what teachers expect from students.
Wiggins, Grant –McTighe, Jay. “Understanding by Design”. Chapter 8: Criteria and Validity. (2005)

