Assessment is the process of gathering evidence of students? knowledge, skills and attitudes. Assessment for learning plays a significant role in improving students learning, and the literature is full with academic studies about the importance of this sort of formative assessment. However, less research is done about students? perspective on the impact of formative assessment on their learning. This paper aims to explore students? perceptions about the impact of formative assessment on teaching and learning. The population of this study is 207 participants; 7 teachers and 200 students from one of the private schools in Abu Dhabi of the United Arab Emirates. The methodology that used in this study is mixed of qualitative and quantitative approaches. A focus discussion group was used as a tool of a qualitative methodology in this study, beside the questionnaires is used as well for this sake. The research question is; what do students believe about the impact of the formative assessment on their learning? The findings of this study shows that teachers and students give less importance to formative assessment techniques as it is expected. Thus, teachers and students need to be trained to know about the importance of formative assessment strategies and techniques. Moreover, students need to be assessed by more interactive tools of assessment based on students interests and differentiations, because when knowing the cognitive approach and learning style of the students, teachers can provide effective feedback that help students comprehend their learning contents, goals, expectations and self-assessment. Besides, this study provides some helpful formative assessment techniques and strategies to assist teachers, students and parents to have a good understanding of the effective implementation of these tools of assessment for learning.