Carol grew up in the UK and trained to be a French and German teacher in the UK. She has taught EFL in Greece and Mexico and is currently based in the US (San Francisco). She has worked on the UC Berkeley extension Certificate in TESL/EFL for about 20 years teaching Methods and Materials and Fundamentals of Linguistics for ESL/EFL teachers (since 2020 online), and worked on the New School MA online TESOL program for about 15 years until the program was discontinued. She has also been writing textbooks and materials for learners since about 1997 and has authored and co-authored several series. Her interests in the field include teacher education and knowledge, the application of research and evidence to teaching, and the brain, gender and language learning. Here are some links to some of the topics discussed. 

Carol Lethaby website –

Cognitive Load Theory – 

University of Essex – 

University of York – 

The Guardian – 

Guadalajara – 

Guadalajara University – 

British Council – 

University of California at Berkeley – 

Certificate for English Education at (UC Berkley Extension) – LINK


The New School (New York) – 

An Introduction to Evidence-Based Teaching in the English Language Classroom: Theory and Practice –

Somerset – 

Exford – 

San Fransisco – 

Intrinsic, Extraneous and Germane Cognitive Load – 

Delusions of Gender: How Our Minds, Society, and Neurosexism Create Difference (Cordelia Fine) – 

Neuroplasticity –