Why did Assessment for Learning fail?

Daisy Christodoulou, Head of Assesment at Ark Schools.
Assessment for learning is one of the most well-evidenced methods of improving education. Yet, after nearly two decades of intensive
training and investment in its principles, educational standards in
England haven’t risen. Why? Daisy Christodoulou considers some possible explanations.
Daisy Christodoulou is the Research and Development Manager at Ark Schools, where she works on new approaches to curriculum and assessment. 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 ITT and assessing without levels.