Pdf on jan 1 2012 dylan wiliam published sustaining formative assessment with teacher learning communities find read and cite all the research you need on researchgate. Sustaining formative assessment with teacher learning communities dylan wiliam wwwdylanwiliamnet overview science and design we need to improve student achievement this requires improving teacher quality improving the quality of entrants takes too long so we have to make the teachers we have better we can change teachers in a range of ways some will benefit students and some will not . Addthis utility frame sustaining formative assessment with teacher learning communities learning sciences international partners with dylan wiliam to offer the latest research and developments in classroom formative assessment and teacher learning communities. Teacher learning communities tlc are groups of teachers who focus on formative assessment strategies and feedback on the impact of techniques previously used these tlcs involve workshop sessions peer lesson observations and regular feedback all contributing towards whole school improvement professional development for teachers has been