Which unforgettable writing lesson did you learn in school? Are there any you still use today? See if any of these ring a bell:

Correct any punctuation errors in the following sentences. Caution: Some sentences may ­already be correct, so don’t be fooled.

The slash or “/” is usually deployed when you need a quick and dirty way of saying “and” or “or.” Examples: “writer/director” and “and/or.” But, one reader asks, how do you make such phrases possessive?

Writers sometimes stumble over how to make words plural. Here are two tricky situations: 1. Family and brand names. 2. Decades and other numbers.