A teenager was sent home from school after being caught selling shots of hand sanitiser to his fellow pupils at 50p a go.
His mother, Jenny Tompkins, from Leeds, posted a picture of him arriving home earlier after his entrepreneurial exploits at Dixons Unity Academy.
In a post on Facebook, she said it was hard to discipline her son when his “dad called to say he was a legend”.
He plans to use the £9 he made to buy a kebab, she added.
Some respondents to the post, which was shared nearly 130,000 times, praised his efforts.
One said “can’t fault his logic”.
Others reminisced about selling cigarettes for £1 a go.
Someone else said: “Bet he gets an A in economics.”