If you want to learn more about the power of coaching in schools there are a number of books that might be really useful to you
Visible Learning for Teachers - Maximising impact on learning John Hattie ISBN 978-0415690157
Outstanding Teaching : Engaging Learners Andy Griffith and Mark Burns ISBN 978-1845907976
Practice Perfect Dough Lemor et al ISBN 978 - 1118216583
Outstanding Lessons Pocket Book Caroline Bentley-Davies ISBN 978-1906610357
I would also recommend having a look at some of the OFSTED reports for outstanding schools, some show a clear link with the coaching techniques that are so useful to creating the right environment for learner centred learning . Happy reading!!