Georgia Department of Education
Ga Virtual Learning: Subject and Verb Agreement Rules [Pdf]
This is a four-page PDF of subject and verb agreement rules with examples.
University of Wisconsin
University of Wisconsin Madison: Writing Center: Grammar and Punctuation
This site provides a grammar reference for students. The rules for using dashes, commas, semicolons, coordinating conjunctions, and conjunctive adverb are included. Topics including subject-verb agreement, how to proofread, and twelve...