This document provides a detailed English lesson plan about the diphthong "eɪ". The objectives are for students to distinguish and pronounce the diphthong by listening to and reading the lyrics of Taylor Swift's song "Shake It Off". The lesson proceeds with warm-up activities, motivation by playing a guessing game, discussion of the diphthong and demonstration of its pronunciation, word and phrase drills, listening to the song while following lyrics, and an activity identifying words in the lyrics containing the diphthong. The class ends with students passing in their worksheets and saying goodbye.