It's imperative that students collaborate in some capacity. Either with classmates, teachers, or members of other grades. Through collaboration, and other forms of discussion, students can gain insights and knowledge they wouldn't have otherwise been able to see. If students are working together toward a common goal as a group, you can sometimes get a 'leader' who runs the show. I think it's important to focus on the entire group, and the many contributions that each person has to offer (regardless of whether they think they do or not). By working with other teachers, and having students come up with their own ideas and goals, they will hopefully develop new techniques to use in and out of the classroom. Things like self-guided projects, or open discussions on topics are ways to implement this.