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Research, Assessment and Measurement, Inc. conducted a study in the Hacienda La Puente and Whittier school districts (1997-98) at the request of the TREE Foundation in Los Angeles. Using the Emergent Literacy Development Inventory (ELDI), RAM found the end-of-year Waterford Early Reading Program™ students outperformed comparison groups in phonological awareness (78.8% vs. 71.9% ; p<.05) and letter recognition (91.2% vs. 85.9%). The overall total score for the Waterford group was significantly higher than for the comparison group (85.2% vs. 79.6% ; p<.0008).

  
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