The objective of this investigation was to confirm the effects of the application of the speech-therapy program to strengthen phonological awareness in children of 5 years of educational institutions in Lima, Peru. A sample of 353 children has been obtained from eight educational institutions selected by convenience. A pre-test was applied, which was then contrasted by a post-test, both measuring a total of seven tests related to phonological awareness, in addition to chi-square tests in order to confirm the hypothesis, which was. It was concluded that the speech-therapy program strengthens positively in phonological awareness in children of 5 years of educational institutions.