Try a Q&A Loyalty Card! I created these cards to promote student questioning and answering in lessons.
I have used them for KS3 pupiils and have had a positive impact in classes.
The idea is also for students to think before they ask or answer a question. I have also seen it to enhance behaviour management in some lessons I have observed!
Why not give it a go? Free download in this blog and you can refine the content to suit your learners.