Phil Ball is a CLIL author and teacher trainer based in northern Spain.Keith Kelly is a writer and speaker on CLIL worldwide, and is based in Plovdiv, Bulgaria.John Clegg is a textbook author and CLIL consultant based in London.

"This volume contains a wide range of novel ideas [and a] rich myriad of criteria, guidelines, and sample materials... While the chapters focus on CLIL practice, the book as a whole should be recognised for its theoretical contributions and recommendations. In relation to practice, there are two outstanding features which are worth mentioning. First, the authors succeed in illustrating every point made through real-life examples of teaching and learning situations as well as activities and materials which have been tried out in specific contexts... Second, their treatment of assessment is exemplar for it offers different courses of action based on the possible scenarios we can find in real institutions and educational systems...

• What is CLIL? Defining parameters The content - language relationship Principles and practice of language in CLIL Guiding input Supporting output Designing materials for CLIL Assessment in CLIL Managing CLIL in schools Training teachers for CLIL