The purpose of this study is to examine teacher-perceived capacity to meet their students’ additional support needs. This study also aims to identify perceived sources of help or hindrance in meeting students’ additional support needs, as these sources may be relevant when focusing on the improvement of teacher potential. The findings reveal that the participants perceive themselves to be fairly capable of meeting students’ additional support needs. The participants’ own competencies are perceived as being helpful in addressing all dimensions of students’ additional support needs. The teachers discern four sources of help or hindrance to which teachers attribute their success: teacher him/herself, student characteristics, school/working conditions and teachers’ self-efficacy beliefs.