the bell

A young boy in a striped sweater sits at a table, reading a book, then closes it and looks up. The scene cuts to a young man in a t-shirt standing before a whiteboard, speaking and gesturing with his hands, then placing his hands on his hips. The boy reappears, now standing and looking at the closed book on the table. The setting is a classroom or study area with bookshelves and a map in the background.