This is because most teachers do not have quality standards and curriculum, instruction and assessment as learning. Focus on subjects and teachers is a priority, not to enrich learning.
The quality because most teachers are not standardized. Curriculum and instruction, and assessment of learners. Schools and teachers are on the set. Not cater to students.
Because of the quality of teachers is not standard. And the curriculum and evaluation method. Focusing on the subject and teacher as a set. Do not give importance to students.