Grab a glass of water, a spoon and a mirror. Paulina Kujawska shows teachers how tongue posture, swallowing and tongue-tie shape the voice you hear.

Why do some singers' muscles refuse to change no matter how well the exercise goes? Paulina Kujawska, a Polish jazz singer who trained in speech pathology, takes you inside the mouth to find out. It is hands-on — you follow along with water, a spoon and a mirror, testing your own tongue's resting position, swallow pattern and range of movement. You will learn the ideal tongue posture, the signs of improper swallowing and tongue-tie, what a narrow palate, mouth breathing, masseter tension and swollen tonsils tell you about a student, how tongue position drives first and second formant tuning, and how to read the Mallampati score. For teachers who want to know when to train and when to refer out.