Research objective was: To establish differences in the level of production of expository written texts in fifth grade students of secondary education in three public educational institutions, in the Iquitos district - 2021, according to study shift. It is a comparative type of research, which included a sample of 268 subjects, a rubric was used to evaluate the study variable. The descriptive results showed that of the 58.2% of the students in the morning shift, 4.1% obtained a Good level; 28.0% Regular, and 26.1% Deficient. For their part, of the 41.8% of students in the late shift, 3.4% obtained a Good level; 16.0% Regular, and 22.4% Deficient. The results of the inferential analysis using the t-Student test, allowed to verify that there are statistically significant differences in the planning of expository written texts in students of the sample, according to study shift (p-value 0.0...