The document provides instruction on using the indefinite and definite articles "a/an" and "the" in English. It explains that "a/an" is used for non-specific or general references, while "the" is used when the intended meaning is specific or unique. Examples are given for the rules and students are asked to practice applying the articles correctly in sentences. Key points covered include using "a/an" with singular countable nouns, and "the" when the intended reference is clear from context.