Jensen’s Punctuation is completely self-contained for easy instruction. All the rules, exercises, tests, and answers are in one book. It contains the five basic rules that cause at least 75% of the errors which appear in student writing, and it contains all rules for every other punctuation mark from the period to the dash. The rules section of the book make this one a keeper; your students will take it with them to college and beyond just for reference. Even though I wrote the book, I still refer to it at times just to be sure in some tricky punctuation situations.