1 00:00:04,400 --> 00:00:09,200 Hi. I'm Gary Musser and this is my co-author Blake Peterson. 2 00:00:09,300 --> 00:00:15,600 About thirty years ago, Bill Burger and I were incharge of teaching mathematics for elementary teachers in Oregon State University. 3 00:00:15,700 --> 00:00:18,400 No existing text books seemed right to us. 4 00:00:18,500 --> 00:00:20,500 So, we wrote in class text of our own. 5 00:00:20,600 --> 00:00:26,600 We wanted a book that would parallel the development in mathematics in the elementary curriculum at an appropriate level 6 00:00:26,700 --> 00:00:34,500 Moreover, since Bill had just finished the big research project on the teaching of geometry, we wanted that book to be reflect in his important findings. 7 00:00:34,600 --> 00:00:36,900 No book did that. 8 00:00:37,000 --> 00:00:41,800 Bill worked with me on the first two editions of this book until he passed away. 9 00:00:41,900 --> 00:00:50,200 We were fortunate at oregon state to recruit Blake to replace Bill and to my delight Blake joined me as a co-author beginning with the fifth edition. 10 00:00:50,300 --> 00:00:53,700 Gary and I, both have Phd.'s in mathematics. 11 00:00:53,800 --> 00:00:58,600 So as we worked on the book, we've been careful to make sure that its mathematically sound. 12 00:00:58,700 --> 00:01:01,700 Both of us also had the oppurtunity to teach in public schools. 13 00:01:01,800 --> 00:01:05,700 As a result, we have a focus on children's thinking. 14 00:01:05,800 --> 00:01:11,800 We strived to have a balance between mathematics that is accessible and related to student's mathematical thinking. 15 00:01:11,900 --> 00:01:13,900 And yeah it is mathematically precise 16 00:01:14,000 --> 00:01:18,800 When you look at the book, the mathematical strength would be quite clear. 17 00:01:18,900 --> 00:01:22,900 The focus on elementary student thinking is apparent order of the chapters. 18 00:01:23,000 --> 00:01:31,100 Its also seen in our discussion on developmental stages of learning geometry called Van Hiele levels, which we talk about in chapter twelve. 19 00:01:31,200 --> 00:01:41,200 Other assets of the book of the pedegogicalites in particular in 10th edition we have incorporated mathematical tasks in every section in a book. 20 00:01:41,300 --> 00:01:48,000 These tasks can be used by instuctors to help the students be actively engaged in the learning process during instruction. 21 00:01:48,100 --> 00:01:52,800 Most of these tasks were developed by me based on my experience teaching the class. 22 00:01:52,900 --> 00:01:56,700 We are especially exited about this 10th edition. 23 00:01:56,800 --> 00:02:03,600 To support the learning process we have integrated QR symbols that connect to videos produced by Blake. 24 00:02:03,700 --> 00:02:08,400 These QR's can be read on most smart phones and tablets. 25 00:02:08,500 --> 00:02:10,600 We use QR's in 3 different ways. 26 00:02:10,700 --> 00:02:19,800 First, we have a video of our first page in note to our students, where we help students learn how to maximize the use of the book. 27 00:02:19,900 --> 00:02:29,100 Second, to the start of this chapter, Blake provides a walk through of the chapter to write students with a preview and a road map. 28 00:02:29,200 --> 00:02:34,900 Finally Blake will describes his ground breaking student videos contain throughout the book. 29 00:02:35,000 --> 00:02:41,600 I had conversations with many children about my mathematical concepts similar to those we talk about in the book. 30 00:02:41,700 --> 00:02:46,700 It was intriguing to see how they thought mathematically as I visited with them. 31 00:02:46,800 --> 00:02:56,200 We feel that these videos would be a great asset to students who use our book as they better understand the learning of mathematics by elemenatary children. 32 00:02:56,300 --> 00:02:59,600 The great thing about these videos is how easier you all can access. 33 00:02:59,700 --> 00:03:04,800 Simply scan in a QR code like you did for this video and the video was there. 34 00:03:04,900 --> 00:03:09,900 We thank you and hope you enjoy learning from our book as much as we enjoyed writing it.