Anna Scretching-Cole teaches about the diagraphs th and wh. Anna Scretching-Cole teaches about the diagraphs th and wh by writing and spelling words. Digraphs are two letters that represent one sound.
Put your hand on your throat and say thing, elongating the th sound. Now do the same with then. Notice a difference? In the short video below, YouTuber Tom Scott explains how your vocal cords vibrate ...