This study investigated how formative assessment implemented in a fifth grade mathematics classroom with a student response system and a student self-evaluative tool affected student self-assessment. Data were collected through individual student and focus group interviews, self-assessment sheets, and teacher reflections. Formative assessment is a low stakes classroom assessment that is an assessment for learning. This study used a student response system to convey feedback from the formative assessment to both students and teacher during instruction. The student self-assessment sheet was implemented to provide a more dynamic level of feedback for students than what could be provided through the student response system alone