Several factors determine the effectiveness of language learning, one of which is the variety of strategies carried out by the teacher in the teaching and learning process. Defined as any efforts made to maximize the learning achievements, strategy encompasses material development, classroom management, and teaching techniques. The question is in what ways the teacher implements such a variety, and what the effect is. This study used a descriptive technique in the sense that it described the existing phenomenon as it was without giving any treatment to bring about the data. It was conducted in an in-service teacher training which aimed to improve the trainees' mastery of ELT strategies and the teaching language. The data were collected using questionnaires, observation, documentation, interviews, and reflection. The subjects were the trainers and the teacher trainees who have mixed language abilities and teaching experiences. Having been collected, the data were analyzed by classifying the topically relevant facts, displaying them, scrutinizing their interconnections, and drawing some conclusive points. The findings show a range of varieties was employed during the training process, covering the use of diverse materials, fun classroom activities, learner-centered approach, affect-lowering classroom management, and varied interaction patterns. As effective learning is dependent on the fresh minds, teachers should always strive to prevent their students from exhausting monotony.