The document outlines the details of the fourth international and 40th annual ELTAI conference held from August 7-9, 2009, in Chennai, focusing on managing mixed-ability classes. It discusses the evolution and implementation of digital language labs (DLLs) and self-access centers (SACs) for enhancing language learning through technology and independent study. Key considerations include planning, resource selection, and training for both instructors and students to utilize these educational tools effectively.