Learn-A-Prep II is an effective aid for the teaching of pre-clinical operative dentistry and a valuable tool for helping the dental student develop necessary dexterity and skill with a dental handpiece. The three distinct resin layers of Learn-A-Prep II provide a way for students to: • Learn the depth of the enamel, dentin and pulp layers • Learn to differentiate the hardness between the enamel and dentin layers • Practice before attempting a particular preparation on dentoform teeth