This study addresses gaps in the research about the effect of professional development (PD) quality on effective instruction by taking a broad perspective when defining professional learning of teachers and by providing a theory-based explanation for effective instruction. Using a large-scale data set, Teaching and Learning International Survey…

This article attempts to unpack the complexity of teachers' professional knowledge construction in Assessment for Learning (hereafter, AfL). It presents a qualitative study of a school-based AfL Project which took place in a secondary school in Hong Kong. Thirty lessons video-recorded in the AfL Project and nine teacher interviews conducted after…