Assessments are the primary feedback mechanism in the educational process. They provide feedback to students on how well they are meeting expectations, to teachers on how well the students are learning, and to administrators on the effectiveness of their programs. This feedback, in turn, stimulates changes and improvements and promotes continuous learning. Assessments in a conservation biology course occur before, during, and after an activity, and aim to empower both teachers and students to improve the quality of learning. This module offers an introduction to classroom assessment, describing the who, why, what, when, and how of the assessment process.