The book reflects a study conducted on Teachers' professional Development Policy and practice in Tanzania -Zanzibar, July, 2011. This book presents the key findings from the area studied , the book is however rich at innumerable recommendations in the form of models and techniques that can be used to develop teachers professionally, many of which being school-based.These include but not limited to; teaching research group, lesson study, and peer observation . The book was designed to give maximum help and great knowledge to both Novice and experienced Teachers in Tanzania and elsewhere through the entire of the Globe on matters pertaining to Teachers professional Development