If you are looking for an introduction to English phonetics and Phonology. You may find this very useful and informative. it also has language activities or Exercises and Vowel Charts
▪Read the given tongue twisters three
times. First time, read in a normal voice
range. Second time, read in a faster mode
and third time, read in a fastest way.
▪You are given five minutes to familiarize
it. Oral presenters will be called in
random. Good luck!