Introducing the passive voice to ESL students can be challenging, but there are several effective methods that can help make learning this concept easier and more engaging for students. Here are some strategies you can consider:

1. Visual Aids: Visual aids such as charts, diagrams, and graphs can help students visualize the structure and formation of passive voice sentences. You can create visual representations that illustrate the subject-object relationship in active and passive sentences.

2. Hands-On Activities: Engage students in hands-on activities such as role-playing exercises, group discussions, and games that involve constructing passive voice sentences. These interactive activities can make learning more dynamic and memorable.

3. Clear Examples: Provide clear and concise examples of passive voice sentences to help students understand how they are formed and used in context. Make sure to include a variety of examples to demonstrate different tenses and sentence structures.

4. Simple Language: When explaining grammar rules related to passive voice, use simple language and avoid complex jargon. Break down the rules into digestible chunks and provide plenty of practice exercises to reinforce learning.

5. Transformation Exercises: Incorporate exercises that require students to transform active voice sentences into passive voice and vice versa. This hands-on practice can help students grasp the concept and apply it correctly in their own writing and speaking.

6. Practical Usage: Encourage students to use passive voice in real-life situations by assigning them tasks such as writing reports, describing processes, or discussing current events using passive constructions.