Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/economics-finance-domain/core-finance/money-and-banking/banking-and-money/v/banking-11-a-reserve-bank Introduction to the idea of a reserve bank. More free lessons at: http://www.khanacademy.org/video?v=M-4GWomLbpc