For many years, I have tried to understand why students end up in difficulties in mathematics. As a future teacher, it is extremely important to have knowledge of the various factors that leads to difficulties in mathematics. As a teacher it is obvious to meet the students who find mathematics a difficult subject, and, therefore it is necessary to have a broader knowledge of how to respond and support these students. According to Ahlberg, number of students with mathematics difficulties is increasing every year, therefore, it is important to help students and organize a supporting school environment that promotes and encourages learning (Ahlberg 2001, p. 104-105). The aim of this degree project is find out, with the help of selected teachers, various factors that may lead to the basis for the students’ mathematics difficulties. The aim is also to find out how teachers work in order to support students with mathematics difficulties. I interviewed four trained mathematics teachers. All pedagogues have years of experience of teaching students with mathematics difficulties and all have had mathematics in their undergraduate studies. In my interviews, I used a tape recorder so that I could focus on questions, answers, and also be involved in as well as reflect over what was said. The results showed that there are various reasons for difficulties in mathematics and different ways of working to address student´s difficulties in mathematics. Mathematics difficulties can depend on emotional obstructions, a poor self-confidence, planning difficulties, a poor working memory, language difficulties, reading and writing difficulties and deficiencies in the didactical field. The result also showed that students’ difficulties can be reduced through dialogue, group works and a laboratory work.