Mechanics Resources
Beyond Books--Building Language
Section 4: Using Punctuation
The Blue Book of Grammar and Punctuation
Punctuation and Capitalization Rules
A Brief, No-Nonsense Guide to Comma Usage
An entertaining look at the seven primary uses of the comma.
David Appleyard's Guide to Writing with Precision
English punctuation calmingly demystified
E.L. Easton Materials for Teaching and Learning
Punctuation quizzes
The Gallery of Misused Quotation Marks
This is hilarious. You could give some them to your students for a chuckle and correction.
Guide to Grammar and Writing
Word and Sentence Level will provide you with excellent punctuation information and lessons. Also check the Interactive Quizzes and Peripherals & Powerpoints.
The Language Live Home for Abused Apostrophes
"The Home for Abused Apostrophes in Truro is a haven for little punctuation marks which have been cruelly misused by greengrocers and other uncaring notice-writers." By Sue Palmer.
Writing Resources include: