Assessment is the process of observing students' behavior to make inferences about their knowledge and abilities. Assessments are tools that allow teachers to make informed decisions about helping students learn and achieve. There are different types of assessments, including informal and formal, as well as formative and summative assessments. When developing assessments, teachers should consider qualities like reliability, validity, standardization, and practicality. Teachers can use a variety of assessment methods and tools to account for students' diverse abilities and backgrounds.