GSU · Readification · Interactive Lab

The Mouth That Makes the Sound

Every letter is a picture of a sound your mouth already knows how to make. Watch how the lips, tongue, teeth, and voice build each one — then test your eye. Free. No login. Any device.

44 English SoundsTeach + Play ModesZero Login

How to Use This Lab

1
Teach Mode — Select any sound from the grid. Watch the mouth diagram animate and read the plain-English articulation guide.
2
Play Mode — Listen to the challenge, identify the correct mouth position. Bronze → Silver → Gold → Platinum progression.
3
Ask GENO — Tap the GENO button any time you want a deeper explanation or want to practice a specific sound.
Your Free Phonics Tutor
GENO is ready to help

Ask GENO to explain any sound, practice a tricky phoneme, or quiz you on the difference between voiced and voiceless consonants. Available in 32 languages, 24/7, free forever.

The Science Behind This Lab

Why Phonics Is the Foundation of All Reading

The National Reading Panel identified systematic phonics as one of five essential pillars of literacy. Research shows that 80–85% of English words are decodable using phonics patterns — yet millions of students were taught to guess from pictures instead. This lab teaches the code the right way.