Written expression is a difficult language skill for students. The fact that writing activities in schools are mostly oriented toward formal features (Göçer, 2011; Temizkan, 2007; Ülper, 2012) is among the reasons for this difficulty. It is preferable to give priority to content characteristics in the act of writing that aims at transferring a message. Moreover, receiving only negative feedback related to errors leads to writing anxiety in students (Barnett, 1992; Ma digan, Linton, & Johnson, 1996). This can result in unsuccessful acts of writing and consequently, unsuccessful texts. However, this problem can be solved if evaluation of the written text is conducted as part of the writing process. This study aims to determine the effect of Flower and Hayes's (1981) Process Writing Approach, which allows the written product to be checked and evaluated during the writing process, on students' writing success and anxiety. The Process Writing Approach Four different approaches have been proposed for writing: the Schmidt model, the Van Galen model, the Hayes and Flower model, and the Hayes model (Güneş, 2007). In the approach developed by Flower and Hayes (1981), the points to be realized throughout the writing process are focused on improvement of the written product. In this approach, three dimensions of the act of writing are empha-Abstract The process writing approach treats writing not as a completed product but as a process. Writing studies are carried out as a part of the process before the written text is completed. This approach focuses on the student in writing lessons, and the teacher only acts as a guide. The process writing approach involves activities occurring during the production of a written text. This study investigated the effect of the process writing approach on writing success and anxiety. The participants in this study were first-year preschool teaching students; a pretestposttest control group quasi-experimental design was employed. Experimental procedures for the study lasted 10 weeks. Data regarding the dimension of written expression were obtained through evaluation of academic writings generated by students at the beginning and end of experimental procedures. Data associated with writing anxiety were collected through the Writing Apprehension Test. Analysis of covariance (ANCOVA) was used for statistical analysis of the data. As a result of the statistical analysis, the study found that the process writing approach had a significant effect on writing success and anxiety. Based on this finding, the use of process writing approach is recommended for written expression studies.