Looking at your shadow (the shorter it is, the more dangerous UV radiation is), and covering up with hats, sunglasses and sunscreen, are among the practical tips for schoolchildren contained in a new guide on the ozone layer for primary school teachers. The OzonAction Education Pack, launched globally in English, French and Spanish, contains an entire teaching and learning programme, based on basic knowledge, practical skills and participation, to enable children to learn about simple solutions to protect the ozone layer and safely enjoy the sun.