Katrina Yerbury 

Katrina has been teaching Biology for over 20 years, most recently at Harrow School Online, where her pupils achieved 75% A*-A in their 2023 A level results in Biology.  Prior to this she was employed as a Teaching and Learning Lead Practitioner at King Edward VI School, where alongside teaching A level Biology and AS level Chemistry, she provided mentoring and support for trainee and newly qualified teachers.  She has worked as an A level examiner for three examination boards, including for Pearson Edexcel, where she is Principal Examiner for both National and International A Level Biology. She is also a materials author, and has contributed to Edexcel IAL Biology and Chemistry A2 Textbooks written in 2018, and worked as a reviewer on the self-study materials written for Harrow School Online, as well as authoring the courses for Highgrove Online School. 

Katrina holds a joint honours degree in Biology and Geography from the University of Bristol and a PGCE in Biology and Games, also from the University of Bristol.  She is a keen athlete and has represented Great Britain in triathlon, duathlon and aquathlon since 2012. She lives by the coast in Bournemouth.