Key elements in this chapter include the description of the history, research and present day application of discrete trial instruction. The discrete trial cycle is explained and requirements for each component of the cycle are reviewed and demonstrated. Prompting procedures and prompt hierarchies used in discrete trial instruction are discussed. Strategies to avoid common prompting problems are addressed. Steps of acquisition common to discrete trial are reviewed, with consideration for the variation in steps of acquisition that are common when teaching expressive and receptive language skills. This training program is based on the RBT Task List and is designed to meet the 40-hour training requirement for the RBT credential. This program is offered independent of the BACB. Current Link: https://bacb.com/rbt-task-list/