This is the story of a science teacher and her work in an over-crowded and under-resourced township secondary school in contemporary South Africa. While set firmly in the present, it is also a journey into the past, shedding fresh light on how the legacy of apartheid education continues to have a major influence on teaching and learning in South Africa. The book has a compelling story line with extensively referenced notes at the end of each chapter. It is intended for a wide audience, which includes general readers, policy makers, teacher-educators, researchers and, most importantly, practitioners in the field. For, while it reminds us of the powerful constraining role that both context and students play in mediating a teacher's practice, it also attests to the power of individual agency. As such it is a celebration of the actions of an ordinary teacher whose willingness to leave the well-worn paths of familiar practice stands as a beacon of possibility for contexts which seem, so often, to be devoid of hope.