Engaging games & activities for dyslexia therapists, teachers, tutors, parents, and literacy specialists.

Sounds In Syllables

Sounds In Syllables (SIS), developed by Sandra Dillon in the 1980s, is a therapeutic-level dyslexia remediation program designed to support individuals with dyslexia from mild to profound levels. SIS materials are exclusively available to Academic Language Therapists who have completed extensive SIS training through the Atlantic Seaboard Dyslexia Education Center (ASDEC) or the Multisensory Language Training Institute of New Mexico (MLTI-NM).

More About SIS

For SIS Therapists

Welcome to Dyslexia Media, your trusted source for SIS materials. As SIS-trained Academic Language Therapists, you understand the importance of maintaining program fidelity. We are committed to providing high-quality SIS materials that support effective dyslexia remediation. Explore our growing collection of SIS materials designed to support your therapy sessions and student success.

Shop All SIS Products & Resources

SIS products are for purchase and use by authorized Academic Language Therapists only. Strictly enforced. Register for an Account

  • How We Learn to Read

    How We Learn to Read

    Watch this informative video from Harvard Medical School on How We Learn To Read!

    How We Learn to Read

    Watch this informative video from Harvard Medical School on How We Learn To Read!

  • Why Dyslexia Therapists Choose SIS

    Why Dyslexia Therapists Choose SIS

    Uncover the keys to literacy success in dyslexia therapy with our guide on Sounds In Syllables (SIS) – a potent multi-sensory Orton-Gillingham approach. Explore evidence-based methods, structured procedures, and personalized...

    Why Dyslexia Therapists Choose SIS

    Uncover the keys to literacy success in dyslexia therapy with our guide on Sounds In Syllables (SIS) – a potent multi-sensory Orton-Gillingham approach. Explore evidence-based methods, structured procedures, and personalized...

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