Reoccurring poor performance in WASSCE, who is to blame?

Result of 2014 WASSCE released by West African Examination Council (WAEC) shows that only 31% of the students obtained credits in five subjects including English & Maths.
I believe that this is not the time to trade blames rather, it is time for all stake holders, namely, parents, teachers, students and relevant government agencies to come together and find a sustainable solution to this very embarrassing persistent problem.