This study aimed at improving speaking skills of students’, who were diagnosed to have speaking fluency problems, through the tasks exercises designed by the researcher. In 20112012 academic year at the Atakent Elementary School in Yenimahalle, Ankara, pre-interviews and post-interviews were conducted and observations were made during classes with 4th grade students in direction of this aim. The participants were assigned to a 60-hour program of speaking fluency improvement tasks. The Single-Subject Research Model, which is one of the quantitative empirical research methods, was used in the study. In analyzing the study data, Mann Whitney U Test was used in order to determine whether there were significant differences in the data before and after the study. After completing the program, results showed that the number of sentences students made per minute, number of words and syllables were increased; the number of unnecessary words students used per minute, number of inverted sentences, number of incomplete sentences, number of omitted letters sentences and number of incomplete words were decreased. Furthermore, the mean score of the number of words students used in a sentence, number of syllables and number of syllables students used in a word were increased; the number of unnecessary words students used in a sentence and number of omitted letters words were decreased