It is our duties as teachers to encourage students to speak out their minds.In my school i encourage students voice through research club.The members of the club come from the whole school.The members are trained on how to carry out research which they do in the whole school.The findings are then shared with whole school and the community at large.
https://educatornetwork.com/Resources/LearningActivities/Details/edb37186-5c9f-4095-bd84-be168fb49ba8
https://www.youtube.com/watch?v=KZ5Iu21i8p8