p.128–129 — a column of real words on one pattern. 52 words and 11 sentences, 30.4 minutes.
The same mouth as sh, with your voice ON. It is the sound in the middle of 'measure' and 'treasure'.
They check it: Hand on your throat: this one buzzes, sh does not.
Not in Somali, Arabic, Urdu. For those children this is a new physical skill, not a reminder. Do not let the column start until the mouth can make it.