All schools have a weekly or monthly faculty meeting. Oftentimes they share new policies, what needs to be improved or discussions around student behavior. Whatever you spend the most time discussing, in a way you are celebrating or encouraging that behavior. What if each faculty meeting you celebrate a teacher who steps out of their comfort zone?
Example: Teacher A allows her students to design a month of lessons and teach the class. It was a struggle to teach them how to structure a lesson and a few did not go so well, but the students felt engaged and empowered by this act of the teacher. So we award teacher A with the Student Empowerment award and a gift card.
This simple gesture may inspire others to take chances.