This guide is intended for use by licensed irrigators who wish to teach others how to design and install residential and commercial irrigation systems. The materials included in the guide have been developed under the assumption that the instructors who use it have little or no formal training as teachers. The first section presents detailed instructions for using the guide and for setting up a classroom and instructional laboratory. Lesson plans covering the following topics are provided: irrigation then and now; procedures for controlling water flow (water meters and cross connections, valves, controllers and electrical wiring); methods of controlling water placement (piping and sprinkler types and nozzles); layout and design (design basics, basics of hydraulics, and procedures for developing a design and checking it mathematically); drip irrigation; and irrigation considerations. Each lesson plan includes lists of required materials and related assignments, steps to complete before teaching the lesson; instructional text, and a subject review exercise. Drawing and laboratory exercises are also provided. Appendixes contain the test of Texas's Licensed Irrigators Act and Permanent Rules for Irrigators, examples of local codes, tips on preparing for the licensing exam, common terminology of the turf irrigation industry, an index, and a pretest and posttest. (MN)