http://kerinmarketing.com/category/classroom-activities/
http://global.oup.com/uk/orc/busecon/business/baines2e/01student/00mcqs/ch01/
http://wps.pearsoned.co.uk/ema_uk_he_chaffey_ebus_4/123/31736/8124615.cw/content/index.html
http://global.oup.com/uk/orc/busecon/business/palmer3e/01student/caseqs/
https://www.teachingenglish.org.uk/english-for-business