Much research on educational innovations treats them as purposeful endeavours, initiated with a clear goal for improvement of practice and eventually evaluating the fidelity of their implementation as well as effectiveness. However, innovative practices in schools can have many sources and their implementation often takes a surprising and…

This teacher development study closely examined a teacher's practice for the purpose of understanding how she selected and implemented instructional materials, and correspondingly how these processes changed as she developed her problem-based practice throughout a school year. Data sources included over 20 hours of planning and analysis meetings…