This classroom module will give students "an introduction to the terminology used when using the coordinate system and testing methodologies for additive manufacturing." The lesson focuses on orienting students to the Cartesian coordinate system, including x, y, and z coordinates, and the standard ASTM International terminology. The lesson is intended to be delivered in lecture format and should take approximately 1 hour. Evaluation questions are included, and the information can be adapted for late middle and high school students.