I did get Doug Lemov's book Teach Like a Champion and I was very impressed. Before I read trhe book, I had thought that I would already be doing many of the 49 techniques that Lemov was going to describe. As it turns out, I was doing perhaps 6 of the 49.
The bad news is that I have a lot left to learn. The good news is that Lemov has done a great job of spelling out his techniques and showing how to do them in a classroom. The book also includes a DVD of examples of the techniques in use. I have not yet had a chance to look at the DVD, but I will see if I can get to it over the summer.
The interesting thing about the techniques listed in the book is that many of them are very small techniques that might save a few minutes a day. But, as Lemov points out, a few minutes here, a few minutes there, times about 200 days in a school year starts to add up to dozens of hours of extra teaching. And that extra time can easily be the difference maker for your students.
I would recommend Teach Like a Champion to any teacher who wants to improve their ability to reach their students.