Practice tests (same format as our real test)
Practice Test 1
Practice Test 2
Comma splices, run on sentences and fragments
Capital Community College Foundation - Explanations and quizzes (towards to bottom of the page)
Utah Valley University - Quiz
Perdue Online Writing Lab - Explanations and quizzes
Wisc-Online - PowerPoint-style explanation of incorrect sentences and some quizzes.
San Diego State University - Nice handout with many examples.
Parallel grammatical structure
Perdue Online Writing Lab - Explanation
MyEnglishTeacher.net - Explanation, examples, and a quiz
Paragraphs
Perdue Online Writing Lab - Advice about how to write a good paragraph.
MyEnglishTeacher.net - Explanation, examples, and a quiz
Transitions and Punctuation Patterns
USLC Handout - This handout from the University of Saskatchewan Language Centre provides a great list of transition words and an explanation of common punctuation patterns.