As paraprofessionals gain more instructional responsibilities for individual students, feasible training strategies must be established to promote effective delivery of instruction. This train-the-trainer study was designed to teach paraprofessionals how to implement an evidence-based instructional practice under the direction of the classroom teacher. After receiving training from a university researcher, a special education teacher trained three paraprofessionals to implement constant time delay while teaching three students with multiple disabilities. The paraprofessional training consisted of a workshop, video modeling, and coaching with performance feedback. A single-case multiple baseline across paraprofessionals design was used to evaluate the effectiveness of the teacher-delivered training package. All paraprofessionals implemented the systematic instructional procedures with high levels of fidelity and accuracy after training. The special education teacher and paraprofessionals shared their perceptions on the highly effective training and value of the study through social validity surveys. Implications and limitations of the study are discussed.