Speech-Language Pathology actions at school: phonological awareness program in the first gradeAcademic failure is one of the most distressing problems of the Brazilian educational system, especially in the literacy process. The reading and writing development requires a set of skills, but phonological awareness has been reported as one of the most relevant. However, Brazilian teachers don´t have enough knowledge about the subject and consequently there are few investments on school environment. The aim of the study was to verify the applicability of a phonological awareness program for students in the first grade. It is a control-type study, non-randomized, double-blind.Sixty-nine students from a public school participated, distributed between Experimental Group (GE=48) and Control Group (GC=21). The program was based on Response to Intervention (RTI -Tier 1), aiming the daily stimulation of syllabic and phonemic skills (synthesis, segmentation, identification and phoneme-grapheme association). The activities were carried out for 12 weeks, lasting up to 25 minutes, conducted by the teachers, supervised by a speech therapist. The students were evaluated before and after the intervention, using standardized tests that investigated phonological awareness skills, reading and writing level. The results demonstrated that the program promoted statistically significant advances (p <0.05) in the EG phonological awareness skills. Approximately 80% of the EG students reached the alphabetical reading and writing level, while only 30% of the GC participants had this performance. Statistical analysis of correlation has demonstrated that phonemic skills are strongly associated with reading and writing progress. The nonresponsiveness rate was approximately 14% (n=7). Five of the EG students were referred specialized institutions and had the diagnosis of learning disorders. The phonological awareness program following RTI Tier 1 is applicable to the school environment because it promoted advances in reading and writing skills. However, the sample size could be considered a limitation of this study, Replication of the study is recommended with larger samples.