Addi­tion­al bil­lions have been spent on edu­ca­tion with­out a marked improve­ment. Some argue for and again­st exams, and oth­ers argue for a com­pe­ten­cy based assess­ment method. Oth­ers argue that it is the qual­i­ty of teach­ers that is the key fac­tor, whilst oth­ers argue that based on the con­cept of the bell curve there will always be those who are at the upper end and those at the low­er end. What do you think?