QLS (Quality in Language Services) is the PanHellenic Association for Quality Language Schools, which was established in 2002 and has endeavoured ever since to support its member-schools in their bid for offering top quality, innovative and effective services to students and parents alike.

QLS has developed and endowed its members with powerful devices, such as the multisensory approach to teaching (QLP), the QLS own Cloud Platform, the Debate Approach to speaking practice and the Phonics Approach to teaching juniors (JUMP), just to mention a few.

Further, QLS has been actively involved in the organization and implementation of some memorable events, such teacher conventions, student conferences, volunteering events (antibullying), international debate competitions and many more.

In 2004, QLS became the first approved Cambridge Examination Centre besides the British Council and under the  code name GR801 it has been running language examinations ever since. In 2018 GR801 was approved to offer the Cambridge University Entrance exams for many University Courses around the world.

Last but not least, GR801 became – in the spring of 2019 – an approved Centre for the provision of Cambridge CELTA courses, as well as examinations for the Cambridge DELTA Module 1