Speech, language and communication skills are an integral part of literacy. The adapted Vocabulary Enrichment Programme (VEP) is a school based, whole class intervention that supports development of oral vocabulary skills in adolescents. This research project aimed to evaluate if the programme would be successful in improving the oral vocabulary skills of first year students in Irish post-primary schools. Four hundred and seven first year students from six NBSS partner schools received the intervention in 2013. This report presents the findings from this research project.