H. W. Fowler offers an interesting, and distinctly English, take on when to use commas with coordinating conjunctions (section 8) and subordinating conjunctions (section 9).  The writing, from 1908, is a bit difficult to follow, but worth it for Fowler's insight.

"The comma between independent sentences," & "The semi-colon between subordinate members," Grammar and Punctuation, H. W. Fowler. 1908. The King's English. http://www.bartleby.com/116/402.html#8

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Pat Byrd offers an audio and text version of her lecture on coordination and subordination.  Byrd discusses the methods and purposes of coordinating and subordinating conjunctions as well as similarities and differences between conjunctions. The lecture includes several good examples.

"Coordination and Subordination," English Grammar for ESL Teachers, Pat Byrd, Georgia State University. http://www2.gsu.edu/~eslhpb/grammar/lecture_9/co_sub.htm

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This site emphasizes the choices writers have to connect clauses.  Instruction also includes definitions of independent and dependent clauses.

"Tipsheet: independent and dependent clauses: coordination and subordination," Center for Academic Success, Butte College.  http://www.butte.edu/services/student/cas/tipsheetsys/01-50/030.html

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If you like a little humor with your grammar, you will like the "Chomp-Chomp" site. Lots of good general coverage of the rules here, and many example sentences with both coordinating and subordinating conjunctions. Be sure to check out the "related terms" at the bottom of the page for links to more good information.

"Coordinating conjunctions,"Grammar Bytes, by Robin L. Simmons.  http://www.chompchomp.com/terms/coordinatingconjunction.htm

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The Writing Center at U. Colorado offers a multi-faceted explanation of coordination and subordination.  Great paragraph exercises, strong explanations of subordination and coordination in context (for example, in developing a strong thesis, strong paragraphs, and strong sentences).

"Coordination & subordination workshop," Writing Center, University of Colorado at Colorado Springs. http://www.uccs.edu/~wrtgcntr/handouts/coordination.html

Purdue offers a good overview of how subordination and coordination are important in developing an outline.  Some information is more appropriate for outlining a research paper than an analytical essay, but the basics apply to most writing situations.

"Developing an outline," Purdue University Online Writing Lab. http://owl.english.purdue.edu/handouts/general/gl_outlin.html

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A good interactive exerice here.  Fill in the blanks in a pararaph with an appropriate subordinating conjunction.  Check your answers, too.  From the Louisiana Tech Online Writing Lab.

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