What does it mean to "move the middle" in a teaching staff?
Your staff roughly divides into three groups: a small number of high performers, a small number who are struggling, and a large middle group who are competent but have significant room to grow. The middle group is your highest-leverage target for improvement because they're the largest group and the most responsive to clear expectations and support.
High performers are already doing excellent work — you can learn from them and celebrate them, but they don't need intensive development. Struggling teachers need targeted intervention. The middle group needs something different: shared clarity about what good practice looks like, regular evidence-based conversations, and a culture that expects and supports continuous improvement.
When you set clear expectations through a shared framework and follow up with consistent classroom presence and professional conversation, the middle moves. And when the middle moves, your school transforms.
More on Teacher Growth and Change
How do teachers actually change their practice?
When three conditions are met: they believe the change is worthwhile, they believe they can do it, and they see evidence that it works.
How should I support a struggling teacher?
Start with directive feedback — specific, concrete guidance about what to do differently.
Why do peer observations often fail, and how can they work?
They fail when they're unfocused.
Answered by Justin Baeder, PhD, Director of The Principal Center and author of three books on instructional leadership.