This document provides instructions for practicing the pronunciation of English vowels according to BBC English. It focuses on vowels 1 and 2, explaining that vowel 1, as in "teen", is produced by spreading the lips, raising the front of the tongue towards the mouth, and having the sides of the tongue touch the molars while tensing the tongue and throat. Vowel 2, as in "tin", involves raising the front of the tongue towards the palate, having a lax tongue with light contact on the molars, and slightly spreading the lips. The document aims to help students of English grasp the subtleties of pronunciation.