Laughing in class. At first glance, the project seems a bit fanciful and unsuitable for school. However, this study really is about observing how laugh and humour can enable to mobilise pupils’ attention and investment. Then, who are these teachers for whom laughing is being an educational conviction? How are they doing and why? This study first relied on the definition of these two theoretical elements before analysing the contents of four interviews. The revelation perturbs; laughing in class could be a good idea that many teachers have already tested out.