Research on Development of Preparation and Presentation system of Educational Materials

计算机在课堂教学中的应用已经相当普遍，但如何准备教学材料，如何有效地展示教学材料，仍然是一个问题。本课题组的研究课题和研究成果概括如下：1.（1）开发了一个可视化的编译器，并在“编译器构造”的课堂上成功地解释了编译器的工作机制。(b)一个可视化的排序算法与5个窗口显示的5个措施的“排序-已经开发。(c)在工作站网络上试用了一个自动练习复习系统。学生发送带有练习答案的邮件，然后系统检查语法和/或答案，并发送带有对答案的评论的回复邮件。它还维护邮件日志，教师可以分析练习的结果。这可能是利用网络为学生和教师提供快速反应的新尝试。(d)一个演示系统已经开发出来，并用于日常的ledtutes和在空中大学的电视讲座。它经历了多次修改和改进。用户界面的实验研究（a）提出了一种垂直书写菜单项的水平菜单，并与传统的垂直菜单进行了实验比较。水平菜单显示更有效的选择时间。(b)多栏菜单被认为不如下拉菜单有效。一个精心设计的实验表明，多列菜单是优越的选择时间上级。(c)比较由垂直和/或水平菜单组成的2级菜单。实验结果表明，水平菜单比垂直菜单更有效。(d)提出了一种远程下拉菜单。结果表明，该方法在选择时间和用户感受上均优于常用的下拉菜单，具有上级的特点。

To use computers in classroom is now quite popular, while there remain problems how to prepare educational materials, and how to present them effectively. The research topics and results of our group are summarized as follows.1. Researche on preparation and presentation for computer science education(a) A visualized compiler is developed and is tried to explain the mechanism of a compiler in a class on "compiler construction" successfully.(b) A visualized sort algorithm with 5 windows showing the 5 measures of "sortedness- has been developed.(c) An automatic exercise review system has been tried on a workstation network. Students send a mail with answers to exercises, then the system checks the syntax and/or answers and send reply mail witli comments to the answers. It also maintains the mailing log and the teacher can analyze the results of the exercises. This may be new trial to use network to provide quick responses both to students and teacher.(d) A presentation system has been developed and used in daily ledtutes and in a TV lecture of the University of the Air. It has experienced many revisions and enhancements.2. Experimental researchs on the user interface(a) A horizontal menu with each item written vertically is proposed and compared experimentally with a traditional vertich menu. The horizontal menu is shown more effective in selection time.(b) The multi-column menu has been believed to be less effective than pull-down menu. A carefully designed experiment has shown that the multi-column menu is superior in selection time.(c) 2-stage menus composed of vertical and/or horizontal menus arc compared. The experiments liave shown hozizontal menu is more effective than vertical menu.(d) A remote pull-down menu is proposed. It is shown to be superior than the usual pull-down menu in selection time and user's feeling.