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Harvard University
Harvard Writing Center: Tips on Grammar, Punctuation and Style
Rather than lists of rules, this site provides practical advice on the use of commas, semicolons, dashes, hyphens, abbreviations, acronyms, split infinitives, "this," "that," italics, and underlining. CCSS.ELA-Literacy.CCRA.L.2
Other
Pc.net: Chat Slang: Abbreviations and Acronyms Used Online
A glossary of abbreviations and acronym often used in email, text messaging, chat or other online communication
Can Teach
Can Teach: Abbreviations and Acronyms
Students can find and analyze different abbreviations and acronyms using newspapers. An online abbreviation and acronym dictionary is linked to this lesson plan for 4th grade.
Capital Community College Foundation
Guide to Grammar and Writing: The Apostrophe
What is an apostrophe? Where are apostrophes found in writing? Use this website to learn more about these crazy little punctuation marks.
Love To Know Media
Your Dictionary: Teaching Spelling in 4th Grade
This article focuses on 4th-grade spelling words which include the following: abbreviations and acronyms, suffixes, capitalization, and silent letters.
Other
The 101 Series: E Mail Lingo
This site from the 101 Series covers many of the abbreviations and acronyms that have been developed to save typing and emoticons to clarify the tone of the text.