Because most teachers do not have quality standards and curriculum, instruction and assessment as learning. Focus on subjects and teachers as an area of priority, not students.
Most teachers do not because of the quality standards. Curriculum and instruction, and assessment of learners. Schools and teachers are on the set. Not the focus of the study.
Because the quality most of the teachers are not standard. And the curriculum and evaluation method. Focusing on the subject and teacher as a set. Don"t make the importance of students.