Daisy Christodoulou is the Head of Assessment at Ark Schools, where she works on assessment reform, replacements for national curriculum levels and readiness for new national exams. Previously, she was Research and Development Manager at Ark, working closely on curriculum reform in secondary English.

Before that, she trained as a secondary English teacher through the Teach First programme and taught in two London comprehensives. Her book, Seven Myths about Education, was published in March 2014. She has been part of government commissions on the future of teacher training and assessment.