Khan Academy
Khan Academy: Correlative Conjunctions
Learn to recognize pairs of correlative conjunctions in sentences.
Sophia Learning
Sophia: Correlative Conjunctions
A screencast [2 min, 2 secs] introducing correlative conjunctions and explaining how they work together within a sentence.
English Plus+
English Plus: Commas With Paired Adjectives
A clear explanation, with examples, of how to decide when to use a comma between adjectives. Learn the difference between paired, or coordinate, adjectives, and cumulative adjectives.
Simon Fraser University
Chem1 Virtual Textbook: The Octet Rule
The General Chemistry Virtual Textbook, or Chem 1, is broken into several sections covering various aspects of topics related to chemistry. This section deals with the history and uses of the octet rule. Biographical information on G.N....
Quia
Quia: Commas Coordinate Adjectives
Review what coordinate adjectives are, then test your understanding with a ten-question quiz.