You've probably heard it: a 10-year-old with ADHD has the executive function of a 7-year-old. But is that true for every skill, every person, every situation? In this episode of Chasing Focus, Zev looks at the "30% rule" often linked to Dr. Russell Barkley. It's a helpful teaching idea, not a calculator for someone's "real age." You'll hear: Why knowing what to do and doing it are two different skills David, 16, who knows being on time matters but still has chaotic mornings Why someone can do it yesterday and struggle today Scaffolding: changing the support without lowering the goal 3 better questions than "what's their executive function age?" ADHD isn't one number. Every person has their own strengths, challenges and support needs. Keep learning, keep building, and keep chasing the focus.