The classroom at Brooklyn International High School is buzzing with excitement, as a dozen teenagers simultaneously try to strike a deal.

“I’ll sell it to you for $6.99, and you can sell it for $13.99. Imagine the profit you’ll make!” - “This toy is amazing. It’s every child’s dream - we could both get rich on this.”

But this is not lunch-break bargaining. These students are learning about the “Economics of One Unit”.

That means how to calculate the profit for one item, the building block of their business, in order to establish what their gross profit could be.

It is part of a course run by the Network For Teaching Entrepreneurship, known as “Nifty”, to educate teenagers about business and encourage them to start their own enterprises.