In the ninth episode of "Naturally" we are visited by Cesar Bona, recognized in 2015 as one of the 50 best teachers in the world, after 16 years of practice. The recognition for this graduate in English Philology and a diploma in Foreign Language Teaching, has helped him to share his way of teaching and learning from childhood with teachers from all over the world. He is the author of titles such as The New Education, The Schools That Change the World, The Emotion of Learning, Humanizing Education and Sustainable Education, a reference today for thousands of teachers and which he comes to present to us in this podcast.