APPI’s activity is focused on improving English language teaching in Portugal. To this effect APPI has been providing their members with a number of opportunities for building their own professional development. APPI’s mission is achieved through consistently appealing to members and teachers of English at large for a lifelong professional updating to be made possible both by APPI’s human and material resources. Since its inception, APPI has gone through various changes in finding the best way to achieve its principal aim: to help improve English language teaching in Portugal embracing teachers of all levels. Maintaining this aim has made APPI expand its professional activities and membership to being one of the largest and most active non-profit-making associations of its kind in Europe.