On Saturday, Comet practices her panel speech on the library steps, waving her sketch notebook.
"The hardest part," she says, "was not deciding. It was explaining why."
Wren smiles. "What does the evidence say? Every reason we gave pointed back to a week of work."
"I wonder what school will look like in ten years," Comet adds. "Study helpers everywhere? Or none at all?"
Nova hovers beside them. "Would you like a hint?" she asks. "Explain it to someone new, and listen to the questions they ask."
Wren grins at you. "Reviewer, share it with your family."