Zhang Xiaoying, Beijing mathematics special grade teacher, senior teacher。He has served as the mathematics teaching and research group leader, grade group leader, department director, Senior High School director and other education and teaching work。In the past 38 years, he has always adhered to the front line of education and teaching, and is committed to middle school education and teaching research。He has won the first prize of Beijing Forbidden Cup Excellent Class Teacher, Haidian District Outstanding four teachers, Tsinghua University advanced worker, national "self-study guidance" teaching experiment excellent teacher and other honorary titles。The class won the "Excellent Class Collective" of Beijing and the League Branch of Tsinghua University。A number of educational teaching papers have been published，He has edited and published a series of books, such as "Dial" and "I Think, Therefore I Am"，He has undertaken many public teaching tasks such as demonstration classes for special grade teachers，Be good at stimulating students' interest in learning mathematics，Help students to solve learning difficulties，Cultivate students' good thinking habits and the ability to think independently and solve problems，Adhere to the combination of "pragmatic" and "innovative"，Popular among teachers and students。