Learners are introduced to the challenge question, which revolves around proving that a cabinet X-ray system can produce bone mineral density images. Students work independently to generate ideas from the questions provided then share with partners and then with the class as part of Multiple Perspectives. As part of the associated Activity 1, learners then explore multiple websites to gather information about Bone Mineral Density and answer questions on a worksheet, then later take a quiz on the material covered in the articles.