In the present study answers of the following questions have been sought: 'What kind of problems have the teacher faced?' and 'How have these problems reflected to their learning environments?' The research method of the study is case study and data were obtained with qualitative data gathering tools. Nine 4th grade teachers had been interviewed at three different times and their classroom learning environments had been observed. According to the results of the study, teachers dubbed problems below most frequently; infrastructure problems of the schools, excessive student numbers in the classrooms, duration of the lesson's being too short for attaining intended learning gains, teachers' being incompetent for the new system and insufficient and wrong guidance. As a result of the observations it was concluded that situations mentioned as problems by the teachers had adversely affected constructive nature of the learning environments formed in classrooms.