McGraw-Hill Cos. will split up into two public companies with one focused on education and the other centered on markets, featuring the Standard & Poor’s unit, reports Forbes. The decision, which has been expected, follows a yearlong review of the company’s business. Investors have pushed the New York company to boost the company’s stock price, which has dropped by more than 40 percent since 2006. The company’s S&P ratings agency has been under fire for its recent downgrade of U.S. debt, as well as several bad calls it made leading up to the financial crisis and economic meltdown that began in 2008. The unit’s president stepped down last month…