Primary Phonics Inventory #4 — Digraphs & Trigraphs is an Orton-Gillingham aligned phonics screener built by a CALT/LDT to assess mastery of all 7 basic digraph patterns: sh, th (voiced), th (unvoiced), wh, ch, tch, and dge. Designed for OG tutors, reading interventionists, and special education teachers — score by digraph pattern with percent correct, ideal for RTI/MTSS and IEP data collection.Primary Phonics Inventory – Basic Digraphs is an Orton-Gillingham aligned assessment tool designed to