This PPT can be used to teach children when to use a and an in a sentence. The PPT contains a slide with an explanation of when to use a. It then has four examples in which a is used in a sentence before a noun that begins with a consonant. The PPT then has a slide teaching when to use an. It has for examples in which an is used in a sentence before a word that begins with a vowel. Students practice the skill with eight sentences.