Cengage Learning used to be called Thomson Learning. The Thomson Corporation sold it to a private equity group including Apax Partners and OMERS Capital Partners for US $7.75 billion, and the name was changed to Cengage Learning on 24 July 2007. In 2011, Cengage Learning bought the National Geographic Society's school publishing business. It combined this school business with the Global ELT business to make the National Geographic Learning brand.