The personal learning network for educators
Teach Like a Champion by Doug Lemov is a great book for any grade.
I read Teacher Man by Frank McCort after my first year of teaching and I would highly recommend it. I could totally relate to the book and it made me laugh.
I think that all teachers would find useful information on technology in education ( the why and the how to) in Will Richardson's book Blogs, Wikis and Podcasts 2010 3rd edition. The emphasis is on forming connections to stay current. His newer book, Personal Learning Networks (2011), co-written with Rob Mancabelli is also very informative, but not as much of a how to.