HUNDREDS of millions of children worldwide attend class every day. With such a wide reach, schools can effectively deliver a vast array of interventions such as immunisations and hygiene education. They can greatly improve the health of the students, who will learn better as a result. School feeding programmes are among these interventions. They take a variety of forms, either targeting the poorest and most marginalised communities or universally covering all public schools in a given country. They are deployed daily, often within broader school health and nutrition programmes, and reach hundreds of millions of children every day. STÉPHANE VERGUET,…