Back to all Advanced Vowels Flashcards A free 19-card set of advanced vowels letter cards to accompany the Heggerty Phonemic Awareness curriculum. Please enter your name. Please enter a valid email address. I agree to receive occasional emails and can unsubscribe at anytime You must accept the Terms and Conditions. Download Thanks for subscribing! Please check your email for further instructions. Something went wrong. Please check your entries and try again.