Authentic assessment is an alternative assessment forcing students to perform like a professional in a real work-place. In other words, this type of assessment trains students to be successful-performers in professional jobs. The purpose of this study was to evaluate the effectiveness of authentic assessment based on three elements including students' performance, students' attitudes, and prohibitive factors in authentic assessment implementation. The participants were 37 Indonesian students who studied in a university and enrolled in spectroscopic methods of analysis subject. To achieve the goal of the study, the researchers used a mixed methods design. The data were gained through three techniques including, observation, test, and interview. The findings informed that the learning constructed through the authentic assessment dimensions was effective to facilitate students' performance and foster students' attitudes positively. The prohibitive factors were the difficulty of gaining motivation and enjoyment of the students at the first meeting. The results of this study implied that the authentic assessment was able to scaffold the students to achieve what they need in the future.