**Abstract**

Assessment does not always have to involve paper and pencil but can instead be a project, an observation, or a task that shows a student has acquired the concept and can make sound connections and linkages with other related concepts. Learning is meaningful when the student comprehends the relationship of what is being learned to other knowledge. Furthermore, concept map measures aspects of learning, which conventional tests cannot measure such as students' misconceptions. As such, the chapter shall focus on formative assessment in mathematics classroom mediated by a method of teaching (concept mapping) that promotes critical thinking, which assists teachers to teach and assess students' understanding and make connections between concepts explicitly.

**Keywords:** assessment, formative assessment, summative assessment, concept mapping, instructional tool
