For any teacher, it is highly important for him to know the class. He must know who his students are, what their nature is and how much knowledge they have got. He must also know what the mental level of his students is so that the teacher can come to that level to teach them what he wants to so that the students are able to comprehend it in a much better way.
Since, this text is about teaching and test results only so it would be used upon a class of students who are getting trained to be teachers only. This is because this text is about motivating the students and how to help them in regaining their confidence. When the teachers would use such information in their future classes; the students would be more confident and would feel much better even if they do not score up to the standards that they had set for themselves.
The students in this class would be in their bachelors and would be doing their bachelors in education with their ages ranging from 20-23 years. These students would be best suited to be explained this text because they would be the future teachers and it is highly important to motivate the students at all levels.