This study has been made for researching the efficacy of the authentic task-based approach in secondary school 5th grade foreign language course. Interview technique from the qualitative research method is used in the study. The data is collected through the semi-structured interviews and the opinions of the teachers. The research process is made in April-May 2015 and is carried out with 5th grade students of Kadriye Abdulmecit Özgözen Secondary School and total 52 students as to be 26 in control group and 26 in experimental group have participated to the study. The opinions of the teachers in the study related with the authentic tasks are generally considered as positive however, they mention about some negativities that may be confronted during the implementation stage.