 5 Tips on how to impress business clients as a business English teacher. Like it or not, ready or not, English is the global language of business. Globalization in business is widespread both in market globalization and production globalization. More importantly, more and more multinational companies are mandating English as the common corporate language, Airbus, Daimler Chrysler, Fast Retailing, Nokia, Renault, Samsung, SAP, Technicolor, and Microsoft in Beijing. Here are 5 Tips on how to impress business clients as a business English teacher. 1. Dress to impress. 2. Be professional. 3. Needs analysis. 4. Provide a course success report. 5. Distribute a course evaluation at the end of the course.