Text, illustrations, and exercises are utilized in these four learning modules to teach respiratory therapy students a variety of job-related skills. The first module, "Anatomy and Physiology of the Central Controls of Respiration" by Margot Lavich, describes the functions of the five centers of the brain that control respiration and identifies abnormal breathing patterns that accompany specific respiratory center lesions. The second module, "Troubleshooting an MA-1 Volume Ventilator in Regards to Volume Loss" by Jan L. Yestingsmeier, teaches the therapist to systematically identify and correct the cause of an obstruction, leak, or malfunction of an MA-1 pre-set volume ventilator. The third and fourth modules were prepared by Linda Slater. "How to Perform Oral Endotracheal Intubation on an Adult Manikin" describes equipment and procedures for inserting an endotracheal tube through the mouth, pharynx, larynx, and glottis of a patient after a cardiopulmonary arrest. "Bacterial Surveillance" discusses the conditions and areas favorable to microbeal growth, the ways microbes are carried to patients, two methods of obtaining equipment cultures, and an effective system for bacterial surveillance. Each module details and illustrates procedures, provides sequential reinforcement exercises with immediate feedback, and concludes with a post-test and answer key. The modules take from 25 to 60 minutes each to complete. (JP)