The main purpose of this work is to present a didactic sequence through the use of dictionary for the development of writing by Brazilian students of Spanish as a foreign language (SFL), levels B1 and B2. We have considered the new pedagogical and practices skills, including the use of dictionary in the classroom as a textual genre aimed at teaching languages. This article is based on the studies of Alzola Fariñas (2001), Kleiman (2002, 2013), Araújo (2007), Pontes (2009), Moreira (2009) and Rojo (2013), among others. It is important that teachers and students know how to use all the possibilities that the dictionary offers for learning. We worked with the lexicographical marks of the language (information on the sociocultural aspects of the language) such as medicine (MED), computing (COMP), botany (BOT), etc. We used suitable monolingual and bilingualized dictionaries for learners in the writing development stage. Keywords: pedagogical dictionary, improving writing, teaching Spanish, didactic Sequence.