The writer of the paper assumes that researchers have focused on the studies in school rather than the extracurricular ones , such as the special purpose apprenticeship and private education 教育史学界对科技教育史研究的讨论把科技史局限在学校范围之内，对于广泛的职官科技教育、艺徒训练以及私学、家学中的科技教育研究薄弱。
3.
Xue jingwan engaged in inside painting art in his all life and the apprentices that he taught have become the great and famous masters , such as li kechang , wen xiangjun , wang jiquan , wu jianzhu , zhang guangzhong , wang xiaocheng and chen dongshun etc . who then formed shandong school 薛京万把一生的心血贡献给了内画事业，他培养的艺徒已形成山东画派，出现了一批艺术大师和内画艺术家，如李克昌、文向君、张广庆、孙即杰、王继泉、吴建柱、张广忠、王孝诚、陈东顺等。
