Morphological awareness is the metalinguistic realization that words consist of meaningful roots and affixes that can be isolated and manipulated. Learners at different proficiency levels use various forms of background knowledge such as cultural knowledge, technical knowledge, religious knowledge, vocabulary knowledge, and contextual visuals. The purpose of this research was to see whether morphological awareness and background knowledge affected the fluency and accuracy of Turkish EFL learners. The participants consisted of 80 Turkish EFL students. At first, participants were homogenized to select samples and eliminate outliers, then a pretest was used to assess participants' writing fluency and accuracy prior to treatment. During the treatment phase, materials were presented to participants, and at the end, a posttest was used to assess the effect of treatment on participants' writing fluency and accuracy. According to the result of the data analysis, there was a significant difference in morphological awareness of EFL learners' writing performance in terms of accuracy from the pre- to posttests. Furthermore, the findings revealed a similar amount of progress in participants' writing fluency.