Week 1: Punctuation and space—one space or two?
— The Chicago Manual of Style, 17th ed. ¶ 6.7
Week 2: Some common misuses of colons
The menagerie included cats, pigeons, newts, and deer ticks.
The menagerie included: cats, pigeons, newts, and deer ticks.
Pros: accuracy and water resistance. Cons: cheap-looking exterior, . . .
(The pros included accuracy and water resistance. Among its cons were a cheap-looking exterior, . . .)”
— The Chicago Manual of Style, 17th ed. ¶ 6.67
Week 3: Commas with direct address
“A comma is used to set off names or words used in direct address.
In correspondence, a comma typically follows the greeting, though a colon may be used instead (especially in formal correspondence).
If the greeting itself consists of a direct address, two marks of punctuation are needed (i.e., the comma in the direct address and the colon or comma following the greeting). (The first mark is often left out in casual correspondence.)
— The Chicago Manual of Style, 17th ed. ¶ 6.53