Grammar and Usage
“Clear, Concise and Direct Sentences,” a succinct guide to improving your writing from The Writing Center at the University of Wisconsin.
“Developing Coherent Paragraphs,” a guide to using and expanding on topic sentences and linking ideas within a paragraph from the University of Toronto.
“The Science of Science Writing,” an article by George D. Gopen and Judith A. Swan on the principles behind effective scientific prose.
Gary A. Olson’s “Punctuation Made Simple” covers the basics in an easy-to-read format.
“Punctuation,” the University of Ottawa’s user-friendly outline of everything you ever wanted to know about commas, semicolons, colons, quotation marks, apostrophes, and dashes, with examples and review quizzes.