The demands of teachers' work involve the teaching and learning of a great variety of concepts, procedures and attitudes, which teachers seek to update. In continuous education courses, teachers have been showing that they have some expectations about the use of handling material and they have been asking for practical teaching activities. Our investigation is into teacher education and teachers' relationships with teaching material. We have analyzed how the creation of children's books with mathematical content has contributed to teachers' professional development. Creating material meant to be used with students has helped to bring both a new meaning to specific contents and other possibilities for professional development. The construction of teaching material must not be seen as something minor or as surrendering to pedagogical technicality; it must be regarded as a very important step in reaching the educational goals.
Teacher education; Children's stories and mathematics; Didactic material; Mathematics teaching