More language arts humor. This can be especially helpful in the younger grades to teach about the differences in punctuation, and to teach how to read with expression. Maybe students can make their own little "comic" between the comma and period.
Punctuation Celebration: This book can be used to teach punctuation, and specifically quotations. The children can do an activity where they pick their favorite punctuation mark and write a short haiku about it.
Sarah Butterfield writing begins and (literally) ends with punctuation. How often do you come across badly punctuated emails, advertisements, and billboards? I stop taking the company seriously as soon as I.