This paper outlines the analysis, design, development, deployment and evaluation stages of Computer-Assisted Language Learning (CALL) software aimed at dyslexic learners. CALL is traditionally aimed at second language acquisition. The research presented here is different because the target group are students with first language difficulties. Dyslexia is a specific learning disorder, which affects roughly eight percent of the population in Ireland [5]. This research identifies the lack of support for dyslexic teenagers in Irish secondary schools and establishes their particular needs. The paper describes CALL courseware development in progress, which aims to aid the reading, organisation and exam skills of dyslexic students through the use of online authentic Junior Certificate history curriculum texts. The final evaluation phase of the project will assess the efficacy of the software and investigate the question of whether dedicated software can improve the reading skills of teenage dyslexic students at word, sentence and text level.