• These digital format THRASSCHARTS are whole-picture multisensory teaching tools for accessing the 44 phonemes (speech sounds) of spoken English. The charts display 120 common graphemes (spelling choices) of written English. Additionally, by activating the asterisk icon, users can access an additional comprehensive set of graphemes. By isolating each speech sound into its own phoneme box with common graphemes, the charts show a clear physical representation of the phonographic process of English.

Learn and interact with the most used THRASS Charts

The THRASS Charts were designed to be a multisensory teaching tool for accessing the 44 phonemes of spoken English and the 120 most common graphemes of written English. Various themes have been incorporated into the charts for use in teaching oral and written language skills and basic grammar skills.

Expand to hear letter names and phonemes

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Discover additional spelling choices (GCAs)

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  • The iTHRASS Chart App for iPad

    The multisensory teaching tool for accessing the 44 phonemes of spoken English and the 120 most common graphemes of written English.