From the article:
$39 billion. That’s the additional amount UNESCO estimates we’ll need to spend each year if we’re to reach the fourth Sustainable Development Goal and deliver universal quality education. Unfortunately, education aid is falling. Bold steps are being proposed by the Education Commission, such as the International Finance Facility, but more is needed.
We need to spend more. But above all, we need to spend more effectively. The demographic clock is ticking down and we risk losing a generation of learners.