The guide “How to prevent hate speech?” is aimed at teaching staff and aims to serve as a support document for working to eradicate hate speech in and through the classroom. In this guide we aim to offer some keys to working against hate speech in and through the educational field, understanding that prevention is essential to ending it. To do so, it is necessary to address it directly, as we do in the first block; but also through intercultural education that eliminates stereotypes and prejudices, as we explain in the second block; and through practical activities that we present in the last block.