This two-minute video lists and explains six major facts about articles.
Source: Nancy Heilman
This 4 minute video is a BASIC overview of what definite vs. indefinite articles are.
Source: Nancy Heilman
This brief video gives a more in-depth discussion of the rules governing the use of the DEFINITE article "the."
Source: Nancy Heilman
This brief video gives a more in-depth discussion of the rules governing the use of the INDEFINITE articles "a" and "an."
Source: Nancy Heilman
As is typical with the English language, there are numerous exceptions, where no articles are used before nouns. The following edufind.com website page lists some of these, as well as giving example sentences: http://www.edufind.com/english/grammar/definite_article_exceptions.php
Also, The Writing Center (at Rensselaer Polytechnic Institute, Troy, New York) has a helpful pdf file, for those who want more in-depth information about article usage: http://www.rpi.edu/web/writingcenter/wc_web/handouts/Articles_ESL.pdf. Countable and uncountable nouns are discussed in this pdf file as well (pages 2 and 3), which is yet another facet of article usage.
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"You covered the topic of articles very thoroughly and engagingly. "
"Excellent packet that explains the information in a fun and engaging way. Consider adding review questions at the end or a worksheet to practice everything that was covered in the videos."