Robots are interdisciplinary in nature. Research in Educational robotics in the education sector has grown tremendously. The robots have been used as teaching tools in STEM subjects. However, even though research interest on educational robots is on the rise, it seems that enough attention has not been paid to the impact they have in students' interest in STEM. This study presents a systematic review of literature on the impact of educational robotics in teaching these subjects to Secondary School Students. The purpose of the review is to i) Synthesize findings from studies that provide learning experiences through educational robotics ii) Identify the possible impact of integration of educational robotics to teaching of Sciences. In this review 25 research studies were included through search and review processes. A synthesis of the studies was done based on matching characteristics and for this case how the educational robots contribute to STEM education in secondary school level. The review show that educational robotics plays an active role in STEM education; however, in some situations no significant improvement in students' sciences and mathematical learning. The results of the review will help curriculum developers in introducing educational robotics in pre-college levels for teaching STEM related subjects. Additionally, it will help researchers in identifying other areas that require more attention.