The purpose of this study is to investigate how teachers in grades 1-3 work with reading comprehension in the classroom. This essey will further analyze how they describe the concept poor comprehenders and how they discover if a pupil have bad reading comprehension. I have used the following questions:  How do teachers describe the concept poor comprehenders? How do the teachers work with reading comprehension in the classroom? How do the teachers describe how they find out if a pupil have bad reading comprehension?  The study is based on a qualitative method with three interviews and three observations. The theories and central concepts that I used is poor comprehenders, reading comprehension, reading comprehension strategies and pedagogical methods. The result shows that the teachers have difficulities of explaining the concept poor comprehenders When comparing which reading comprehension method they use in the teaching, the result shows that they have used similar methods but in different ways. The result also shows that all the teachers in this study believes that it´s hard to find out if a pupil have problems with reading comprehension.