标题： 一个在线天文辅导：GEAS 自我复习库 显示英文标题

标题： An Online Tutor for Astronomy: The GEAS Self-Review Library

摘要： 我们介绍了一个交互式在线资源，供修读入门天文学课程的学生和大学教师使用。 通识教育天文学资料（GEAS）在线导师引导学生掌握核心天文学概念和一般天文学材料的数学应用。 它包含超过12,000道题目，并附有相关的提示和解答。 快速掌握内容的学生可以继续学习后续主题，而准备不足或犹豫的学生可以针对某一主题进行长时间练习，重复内容最少。 学生将获得个人账户用于学习，课程教师则可获得按时间和主题跟踪整个学生群体的概览信息。 诊断工具支持自我评估以及教师与学生之间的紧密合作，即使对于远程学习者也是如此。 一项初步使用研究表明，随着学习时间的增加，表现有明显提升，且使用这些材料的远程学习者的表现与在校天文学学生的对照组相当或更好。 我们正在积极寻找新的合作者，将在天文学课程和其他教育场所使用此资源。 显示英文摘要

摘要： We introduce an interactive online resource for use by students and college instructors in introductory astronomy courses. The General Education Astronomy Source (GEAS) online tutor guides students developing mastery of core astronomical concepts and mathematical applications of general astronomy material. It contains over 12,000 questions, with linked hints and solutions. Students who master the material quickly can advance through the topics, while under-prepared or hesitant students can focus on questions on a certain topic for as long as needed, with minimal repetition. Students receive individual accounts for study and course instructors are provided with overview tracking information, by time and by topic, for entire cohorts of students. Diagnostic tools support self-evaluation and close collaboration between instructor and student, even for distance learners. An initial usage study shows clear trends in performance which increase with study time, and indicates that distance learners using these materials perform as well as or better than a comparison cohort of on-campus astronomy students. We are actively seeking new collaborators to use this resource in astronomy courses and other educational venues.