Raise the back of your tongue to touch the soft palate (velum). Stop the air, then release.

Americans pronounce crows as KROHZ (/kroʊz/). You'll hear it in sentences like "The rooster crows at dawn to wake everyone up".
Record yourself saying "crows" and play it back. The mic stays on your device — nothing's uploaded.
1 syllable, 4 sounds. Explore each sound's mouth shape and how it's made.
Raise the back of your tongue to touch the soft palate (velum). Stop the air, then release.

Curl or bunch your tongue without letting the tip touch the roof of your mouth. Brace the sides of your tongue against your upper back teeth, and round your lips slightly.
Start with your mouth slightly open, then close your jaw slightly as your lips round. Shift your tongue back slightly, then stretch the back up.
Same position as S, but add vocal cord vibration. Feel the buzz.
