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

Americans pronounce coordination as koh-or-duh-NAY-shuhn (/koʊˌɔrdəˈneɪʃən/). In "coordination", the "t" between vowels sounds like a quick "d" — the tongue briefly taps the ridge behind the upper teeth. This is called the Flap T, a small move that separates 'classroom' from 'native'. So instead of koh·or·tuh·NAY·shuhn, you get koh·OR·duh·NAY·shuhn. Stress falls on the fourth syllable — keep everything else short and quick. You'll hear it in sentences like "They practice passing drills every afternoon to improve coordination".
Record yourself saying "coordination" and play it back. The mic stays on your device — nothing's uploaded.
5 syllables, 10 sounds. Tap a syllable to jump to its row, then explore each sound's mouth shape and how it's made.
Start with the 'aw' jaw drop and rounded lips. Pull the tongue back and up while keeping the lips rounded for the R.
The schwa before N disappears — N becomes the vowel of the syllable. Go straight from the previous consonant to N.

Start with your jaw slightly open and the front of your tongue forward and slightly up. Glide upward, your jaw closes a little more and your tongue arches higher toward the roof of the mouth.
Flare your lips and lift the mid-front tongue close to the roof of your mouth. Blow air through without voicing.

Relax your lips, jaw, and tongue completely. Drop your jaw slightly and keep the tongue neutral.
The schwa before N disappears — N becomes the vowel of the syllable. Go straight from the previous consonant to N.

The textbook way isn't wrong — it's just not how anyone actually says it.
In "coordination", the "t" between vowels sounds like a quick "d" — the tongue briefly taps the ridge behind the upper teeth. /t/ or /d/ becomes a quick tap [ɾ] — sounds like a soft D. The tongue briefly taps the ridge behind the upper teeth.
In "coordination", the short unstressed vowel before "n" disappears — the schwa is absorbed and the "n" becomes the syllable nucleus on its own. Schwa is absorbed — consonant becomes the syllable nucleus.
Stress falls on the fourth syllable, not the others. Stretch NAY — keep everything else short and quick.
Don't pronounce the second syllable too fully. The unstressed syllable reduces to a schwa — the lazy "uh" sound — in casual speech.