What do we mean by "Coherent Education Systems?"

The second Millennium Development Goal to “ensure that by 2015, children everywhere, boys and girls alike will be able to complete a full course of primary schooling", saw millions more children attend schools around the world compared to the beginning of the millennium. As 2016 begins, however, we find ourselves in a global learning crisis. The newly set education Sustainable Development Goal, thus, focuses on achieving “relevant and effective learning outcomes” instead.