Now There's a report by the National Union of Teachers in the Guardian in 2022 that stated that half of all teachers will be gone from the profession in the next 5 years. In the United States alone, an estimated 8% of teachers leave the profession every single year. And this is resulting in a chronic teacher shortage. And the same is felt across a number of developed and developing countries, including the UK where I was a teacher. This shortage is not only affecting the quality of education, but also leading to schools incurring substantial costs. Now schools are spending money on supply teachers in order to fill the gap when teachers are ill, or also when teachers walk out of school without t schools being able to fill their positions, And naturally, students do need safeguards, and therefore, you need somebody in the classroom. But this comes at a cost, and we will explore this course at another episode. Now the really interesting statistics that I want you to know is directly on school closures.