This paper presents the findings of a descriptive multiple case study carried out with six teachers of English in five public secondary schools in a city in northwestern Mexico aimed to determine how writing was taught. A mixed methods approach was followed with an embedded design in which qualitative data had increased weight and quantitative data was supportive. Qualitative data were collected through an interview guide approach, non-participant observation, and qualitative document analysis, while quantitative supporting data were collected using structured observation and quantitative document analysis. In the qualitative analysis, four themes emerged: (1) writing activities, (2) resources, (3) assessment, and (4) frequency of work on writing. Results suggest that writing activities in which students are required to write one word, a phrase or a sentence predominate. Also, findings show that paper-based resources for writing tasks are frequently used. Qualitative results suggest that written exams, word dictation and class projects were assessment practices assigned by teachers; besides, findings suggest that the writing activities are form-driven rather than meaning-driven. The relevance of this research is that findings might provide the basis for designing quantitative studies in this context that allow for generalizations.