As a successful businessperson for over 25 years, I led a team of 30 textbook editors, provided strategy consulting to executives in dozens of companies, and taught classes and individual adults in business and recreational settings. In my experience, success in life after school depends on the effective use of language and numbers, two skills that many students have not fully developed.

As a tutor, I always start by listening and building rapport with my student, and I tailor my approa...