The purpose of this research is to identify the problems encountered in teaching and learning English according to secondary school students and to determine the level of differentiation of students' perceptions of the problems in this regard. The population of the study consists of 24,850 secondary school students in Istanbul Sultanbeyli, while the study sample is comprised of 1261 secondary school students. The findings obtained from the study are the following: (1) According to the secondary school students, "teachers' getting angry at mistakes" is the highest factor encountered in English learning and teaching while "teachers' not being prepared for lessons" is the lowest factor; (2) As grade levels and the number of siblings increase, the students' perceptions on the problems encountered in English teaching and learning also rise; and (3) There are no significant differences between the students' opinions on the problems encountered in English teaching and learning according to studying in public or private secondary school, parents' occupation, family income, taking/or not English courses, the place and the duration of the subsidiary course variables.