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

Americans pronounce k as KAY (/keɪ/). You'll hear it in sentences like "The k-9 unit was brought in to search for drugs".
Record yourself saying "k" and play it back. The mic stays on your device — nothing's uploaded.
1 syllable, 2 sounds. Explore each sound's mouth shape and how it's made.