Today only, you can download a classic teaching resource from Homeschool Freebie of the Day. "Stops; Or How To Punctuate" by Paul Allardyce, is a concise guide to proper punctuation. This was originally published in 1895 but can still be used today.
Free download from Google Book Search.
Originally published in 1842, "The United States Reader: Containing a Variety of Exercises in Reading, Punctuation, Figures of Speech, Spelling, &c. : for the Use of Schools", by John D. Post, is a classic textbook of grammar lessons.
Here are some sites with free punctuation worksheets and printables.
MrDonn.org Language Arts Punctuation & Capitalization Lesson Plans & Activities
The Blue Book of Grammar and Punctuation Free Interactive Punctuation, Capitalization, and Writing Numbers Quizzes
Literacy Teaching Ideas-Writing Punctuation and Grammar
4 hours ago