Tongue-twisters are a great way to develop your articulation for both native and non-native speakers of English.
This very difficult tongue-twister is a final exercise in a series of 20 articulation exercises developed by Michael Jacobs from a new book on voice training for interpreters “Improving the Interpreter’s Voice.”
Listen to it here:
Tongue Twister “The Sixth Sheik’s Sixth Sheep’s Sick”:
The entire series of exercises can be accessed by clicking this link to the book’s webpage.