Formative assessment is an ongoing process that provides feedback during instruction to improve teaching and learning. It identifies what students have learned well and areas they need to work on. Examples of formatative assessment include asking questions in class, discussions, and assignments without grades. Summative assessment evaluates learning at the end of a period through tests and exams, which usually have grades. Both formative and summative assessments are important in the classroom, as one without the other is ineffective. Formative assessment in particular helps teachers adjust their instruction to meet student needs.