"Someone get that child back to the visitors' gallery. This is a mathematics symposium, not a daycare."
Dr. Lawrence Whitfield did not look up when he said it. His hand moved dismissively above the judges' table, as though the small boy at the microphone were a waiter who had interrupted a private dinner.

Eight hundred people occupied the auditorium at the Boston Convention Center, and for a moment the only sound was the faint hum of the projection system. Then several adults laughed, and Elijah Brooks wished the floor beneath his borrowed dress shoes would open and swallow him.
Elijah was ten years old. His glasses were thick, his white shirt had belonged to an older cousin, and the sleeves of his blue blazer reached past his wrists. The presentation badge around his neck read PARTICIPANT 47, BOOKER T. WASHINGTON ELEMENTARY, but Whitfield had already decided what it meant to see a Black child from Roxbury standing in a room full of distinguished researchers. To the professor, Elijah was an interruption, not an invited speaker.
"Sir," Elijah said, "I'm supposed to present this morning. They sent me a letter."
"Did they?" Whitfield lifted his eyes at last. "I suppose they let anyone submit an application now."
Elijah reached into his folder for the acceptance letter, but his fingers had gone numb. The folder tilted, and his carefully numbered pages slid out onto the polished stage. Pencil drawings of colored regions skated in different directions; one page floated almost to Whitfield's shoe. Elijah bent to gather them while the audience watched, and the laughter that followed was quiet enough for the people laughing to pretend they had done nothing wrong.
The boy did not know yet that Dr. Patricia Ruiz of Stanford had stopped taking notes. He did not see Dr. Samuel Brooks of Harvard slowly straighten in his chair, or the way symposium director Helen Park looked toward her staff with visible alarm. He knew only the heat in his cheeks and the frightening possibility that he might cry before anyone had heard a single sentence of his work. He had spent six months preparing for this moment, and already he wanted to go home.
Six months earlier, mathematics had been the best thing about an ordinary Thursday afternoon. Elijah sat in the library at Booker T. Washington Elementary with a pencil stub, a packet of colored squares, and a borrowed book that had been repaired so often its spine looked like a patchwork quilt. Outside, basketballs thudded against the playground pavement. Inside, the school heating system rattled whenever someone opened the corridor door, and Elijah had three more minutes before the librarian asked him to leave.
His mother, Danielle Brooks, cleaned patient rooms at a hospital on one shift and processed medical bills on another. His grandmother, Ruth, collected him and his seven-year-old sister, Nia, most afternoons, although arthritis made the stairs to their second-floor apartment difficult. There was enough food in the kitchen, usually, but not enough money to waste. Elijah knew the price of a gallon of milk and the exact date the electricity bill needed paying, facts most of the boys in his class never discussed.