OBJECTIVE: To evaluate the improvement in the scores of summative assessment after formative assessment practices as well as expectation and satisfaction level of students with formative assessment in subject of the science of Dental Materials. METHODOLOGY: It was a longitudinal study with pre-post design that was conducted on second-year BDS students over a year. Students were selected by non-probability, convenience sampling technique from a private dental college. Summative assessments conducted at the end of semester III were considered pre-intervention tests. Semester IV was planned with formative assessment and feedback sessions after every topic and summative assessments conducted at the end of semester IV were considered Post-intervention tests. The summative assessment was done by Multiple Choice questions and a structured practical exam. A structured close-ended questionnaire was administered to record Students' level of expectation and satisfaction. The analysis was performed by using SPSS version 20. Quantitative analysis was reported by means and standard deviation. Furthermore, paired sample t-test was performed to analyze students' scores before and after formative assessment. Frequencies and percentages were calculated for the number of responses to each item in the questionnaire. RESULTS: Performances of students in semester III (before formative assessment) with semester IV (after formative assessment) were compared with paired-sample t-test results showed a significant increase in the scores of students before (M=62.74, SD±14.72) to after (M=67.16, SD ±14.53). KEYWORDS: Expectation, satisfaction, formative assessment, Summative Assessment, Science of dental materials.