The Implementation of Planning and Its Effect on EFL Students' Writing Performance. This quasi-experimental study is aimed at investigating the effect of planning on EFL students' writing performance. To answer the research question, a quasi experimental, posttest only nonequivalent group-design was used. The subjects of the study were fifty sophomores majoring in the Teaching English as a Foreign Language in STKIP PGRI Pasuruan in the academic year 2014-2015. From the accessible population of all students taking essay writing class, two intact classes were chosen, in which each consisted of 24 and 23 students. These two intact classes were taught by the same instructor for 8 weeks from April 2015 to June 2015. The result of the experiment shows that there is no difference between the students who were taught by prewriting strategies and those who were taught by rough drafting strategies (p = .144).