《叩响开放教育的门环》一书是上海开放大学研究员徐皓先生继《站在远程教育的门槛上》之后,又一部关于中国远程教育研究的学术之作。它更是徐皓先生十多年来孜孜探索开放教育心路历程的生动写照。为此国际教育领域里的著名专家和学者、香港大学教育学院讲座教授、博士生导师、哈佛大学教育研究院讲座教授程介明先生在序言中专门说道,徐皓先生“不但透彻地了解开放大学的深远意义,而且本身是一位出色的实践者”。 “Knock ring open door knocker” is a research fellow of Shanghai Open University, following the “standing on the threshold of distance education”, and another on China’s distance education research academic. It is a vivid portrayal of Mr. Xu Hao’s efforts in exploring the mentality of open education for over a decade. To this end, renowned experts and scholars in the field of international education, lecturer and doctoral tutor at the Institute of Education, University of Hong Kong, and Professor Cheng Jiming, a lecturer at Harvard University Institute of Education, said in his preface that Mr. Xu Hao “not only thoroughly understands the Far-reaching significance, but also an excellent practitioner in itself. ”