PURPOSES: to compare the findings of pre-test and post-test evaluation in students with developmental dyslexia and good readers submitted to phonological remediation program and to check the therapeutic effectiveness of phonological remediation program in students with developmental dyslexia. METHODS: 40 students of the 2nd to 4th grades of public schools of Marília-SP, both genders, from to 8 to 12-year old took part in this study; distributed in GI: 20 students with the interdisciplinary diagnosis of developmental dyslexia and GII: 20 good readers paired according to gender, age and school level. All students were submitted to the Cognitive-Linguistic Performance Test in the collective and individual version, oral reading and text comprehension. RESULTS: the results showed statistically significant differences indicating that the GI and GII students submitted to phonological remediation program showed higher performance in post-test when compared to pre-test in the most evaluated cognitive-linguistic skills, including reading and text comprehension. CONCLUSION: the phonological remediation program was effective for students with or without developmental dyslexia, suggesting that the sound-letter relation skill should be used in the classroom context in order to improve the reading skills for these students.