Thixotropy: a review

Codeswitching refers to the phenomenon of speakers moving regularly between languages within a single communication event (written or spoken). It is ubiquitous in bi- or multi-lingual societies and poses challenges to their education systems. English is often a second language used in these contexts and has often been advocated or adopted as the medium of instruction. Codeswitching by teachers and students is often deemed inappropriate and ineffective, a monolingual classroom policy may be imposed by authorities and discussions about codeswitching may go unnoticed or even be avoided (Wei & Martin, 2009). Against this backdrop, the volume reviewed here probes classroom codeswitching, an under developed research area, at university level by reporting case studies conducted with teachers and students of English as a foreign language (EFL) in Asian contexts. Participating teachers and students in the case studies were from Asian universitie