Khan/khan-exercises — pull request #15428 by aatash (2012-03-05 10:56:22+00:00)
Title: A module on sentence complexity

I know Khan Academy doesn't have any grammar material yet, but why not start? I decided to make a grammar module on classifying sentences as either simple, compound, complex, or compound-complex sentences.

See here for reference:
http://www.eslbee.com/sentences.htm
http://writingcenter.gmu.edu/handout-independent-and-dependent-clauses.php