The topic focuses on developing a system of exercises to enhance communication skills through sentence exercises for speaking purposes for third-grade students in Da Lat city, Lam Dong province. The project proposes a five-step process for creating speaking purpose sentence exercises: defining objectives, types of exercises, selecting language materials, constructing exercise instructions, and finalizing the exercises. At the same time, the exercise system is designed around groups of exercises related to imperative sentences, exclamatory sentences, and punctuation.