Studies found that students who are exposed to more natural light perform better than students who are not. Based on this fact, there some Learn by Design School Constructions. I share on of the schools' link and article above.

Blog Post:
https://www.yahoo.com/health/learning-by-design-how-classroom-decor-impacts-101785689917.html

School:
http://www.nxtbook.com/nxtbooks/stratton/learningbydesign_2013spring/#/60

Does extrinsic motivation completely kills intrinsic motivation? Two informative blog posts.They can be an answer to Selcuk's question.

http://blogs.kqed.org/mindshift/2014/10/how-teachers-can-motivate-students-of-any-age/

http://blogs.kqed.org/mindshift/2014/03/what-keeps-students-them-motivated-to-learn/