This video encompasses the most important elements you need to consider in building a positive classroom environment. It provides ideas, do's and don't's, tips and links to the Quality Teaching Model.
Further Links:
More perspective on positive and negative classroom enviroments: http://www.youtube.com/watch?v=9J9GbbR6u7Q
Sir Ken Robinson animation talk on Changing Education Paradigms: http://www.youtube.com/watch?v=zDZFcDGpL4U
Visuals on a colourful, well organised and vibrant classroom:
http://www.youtube.com/watch?v=lisjQEhoZYc