Online Writing Lab at Purdue University
Purdue University Owl: Commas vs. Semicolons in Compound Sentences
This lesson presents information on the use of the comma and semicolon in a compound sentence. A link will take you to an interactive exercise that applies the mechanics content. L.9-10.2a Punc/Indep Clause
University of Ottawa (Canada)
Univ. Of Ottawa Hyper Grammar: Punctuation Errors
A ten-sentence punctuation quiz that tests whether or not students can correctly detect punctuation errors. Explanations and answers provided.