Use it to identify what students have yet to learn, diagnose any gaps in learning that will impede progress towards current learning objectives, or uncover any strengths that can be encouraged

It provides feedback and information during the instructional process, while learning is taking place, and while learning is occurring. Formative assessment measures student progress but it can also assess your own progress as an instructor.

It takes place after the learning has been completed and provides information and feedback that sums up the teaching and learning process. Its purpose is to inform teachers about how their students are progressing.