You’re sure you know your 3rd grade teacher’s name— it’s like you’re hovering over it in your mind, but it just won’t materialize. Researchers call this tantalizing torment a “tip-of-the-tongue state,” and it’s something everyone experiences. But what’s actually happening when a word’s caught here, and how can you best get it unstuck? Cella Wright explores why your brain can struggle with recall. Lesson by Cella Wright, directed by Avi Ofer.