Vowels
u:
(moon)How to make the sound?
/u:/ is a long sound. Look at the diagram. Listen and then say the sound. Make your lips into a tunnel shape. Your tongue is a long way back in your mouth.

Sound and spelling
too
group
shoe
blue
/u:/ is a long sound. Look at the diagram. Listen and then say the sound. Make your lips into a tunnel shape. Your tongue is a long way back in your mouth.