What do you think of this sentence?
Jeff, a fifth-grade teacher, will soon be moving into his newly-painted house.
Hyphens can be slippery! I want to make two points today. First, don’t use a hyphen with an adverb (a word ending in -ly). But note that hyphens are okay with well: a well-written story. (Some writers don’t use them, though. I told you hyphens are slippery!)
Jeff, a fifth-grade teacher, will soon be moving into his newly painted house. CORRECT
Second, hyphens tend to disappear over time. The Associated Press recommends dropping hyphens when there’s no possibility of confusion. If you agree with the AP (as I do!), you can drop the hyphen in fifth grade teacher.
Jeff, a fifth grade teacher, will soon be moving into his newly painted house. ALSO CORRECT