by Dylan Wiliam and Siobhan Leahy
Assessment—A Two-Year Professional Development Pack for Schools and Colleges:
Teacher Learning Communities in Action, created by renowned international
education researchers Siobhan Leahy and Dylan Wiliam, provides all the
materials needed for a complete professional development day exploring the
components of effective Teacher Learning Communities (TLC), the Assessment for Learning (AfL) concept,
and their impact on the implementation of formative assessment.