The UK NARIC research team is tracking announcements on school closures and exam arrangements worldwide, and publishing these as announcements are made on the UK NARIC blog.
At the time of writing this news story - 20 April - the latest figures from UNESCO indicated that 191 countries have closed schools and universities at a national level.
For more details country-by-country, and for the latest up-to-date information, visit our blog page Charting the impact of COVID-19.