Teaching and Learning: It's all about relationships. First and foremost, care about your students as people. After 3 decades, I am still driven by my burning desire to make their lives better. I get to know them and their families. I work with students and their parents to determine children's goals and dreams, plan for reaching them (connected to classroom learning), and create a system of accountability. Then, follow-through, and responsiveness to changing student interests, are critical components for ongoing progress. Believe in each student's potential for success. Realize that you are planting seeds of knowledge, which may not come to fruition until students are developmentally ready to connect them to real-life applications. Help them make those connections, whenever possible. Expect students to value learning, be responsible, and to demonstrate respect for authority, their peers, themselves, and their community. When it comes to discipline, seek to be restorative; offenders should be truly held accountable by repairing the harm they have caused. Punitive measures should be reserved for extreme or chronic circumstances.
Seek to consistently model these qualities for your students; this will validate your expectations of them. Also, empower students in shaping the curriculum and their classroom experiences, in ways that are developmentally appropriate. This, along with the family planning component, help students feel empowered, engaged in the educational process, and more competent, resulting in increased motivation/effort.
Leadership: The first part of my answer demonstrates how this works for teachers. How do they get to this point? By being led by administrators who model those aforementioned behaviors, which teachers then utilize with their students. By the way, such a learning environment also will provide developmental paths for student leaders to emerge.