Self-tutoring about English: the tutor mentions hyphenating numbers. Indeed, numbers like 74 should be hyphenated, if written: seventy-four. I’ve never known so. Source: Hodges, Horner et al. Harbrace Handbook for Canadians. Scarborough: Nelson, 2003.

Tutoring English, new words are new discoveries. The tutor mentions one. I don’t know if I recall hearing “self-effacing.” However, I encountered it today. It means “tending to avoid attention.” Source: Mish, Frederick C. The Merriam-Webster Dictionary. Springfield: Merriam-Webster, 2004.