Place the very tip of your tongue slightly between your teeth. Blow air gently around it without voicing.

Americans pronounce through as throo (/θru/). You'll hear it in sentences like "There's a path through the trees" or "I need to get through this thick book" — more examples below.
Record yourself saying "through" and play it back. The mic stays on your device — nothing's uploaded.
1 syllable, 3 sounds. Explore each sound's mouth shape and how it's made.
Place the very tip of your tongue slightly between your teeth. Blow air gently around it without voicing.

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.
Round your lips into a tight circle. Let your tongue rest in the middle of your mouth, slightly raised.
Click any sentence to see the full breakdown — every link, every reduction, every flap-T.