This study was conducted to determine the theme writing skills of Bachelor of Secondary Education (BSEd) students in Pangasinan State University -- Lingayen Campus, Philippines. Its specific problems centered on: (1) the profile of students; (2) the extent of observance of the characteristics of an effective theme to the students as perceived by the teachers; (3) the extent of contribution of pre-writing activities to the development of the theme writing skills of the students as perceived by them; (4) the extent of seriousness of the problems encountered by the students and the teachers in theme writing; and (5) the significant difference in the extent of observance of the characteristics of an effective theme to the students as perceived by the teachers across their profile variables. The descriptive-correlational method of research was utilized in this study. The questionnaire was employed in gathering the data. The data gathered were analyzed and interpreted using frequency counts, percentages, mean, standard deviation, independent sample t-test, one-way ANOVA and two-way ANOVA. Salient findings of the study were as follows: (1) the extent of observance of the characteristics of an effective theme to the students is moderately high; (2) the extent of contribution of pre-writing activities to development of theme writing skills of the students is also moderately high; and (3) there is no significant difference in the extent of observance of characteristics of an effective theme to the students across their profile variables.