This research aimed to provide an innovative chemistry learning material with guided tasks to improve students’ competence in Chemistry. It involved 180 students enrolled in the Analytical Chemistry course at State University of Medan in academic year of 2016/2017. The samples were purposively selected and divided into two groups. The research consisted of several steps including enrichment, innovation and standardization of learning material, followed by implementation of the developed learning material in class. A set of good quality learning material equipped with the guided task for Gravimetry topic has been provided. It contained relevant contextual examples, laboratory works, students’ activities, multimedia, and hyperlink to trustworthy websites. Implementation of innovative learning material has been conducted by using a set of developed learning material in the experimental class while the existing textbook was used in the control class. The research findings highlighted several points: (1) well-implemented innovative learning material was effective to improve the students’ competence; (2) learning outcome in experimental class was found higher than that in control class; (3) the guided task in the learning package facilitated the students to learn the selected chemistry topic independently which in turn shifted student learning style from lecturer-oriented to student-oriented; (4) the guided task not only made the students be familiar with searching for scientific documents to complete the given tasks but also improved the students’ ability to write and organize their assignments; (5) students’ academic attitudes, observed during the learning activities, were categorized as very good.

中文翻译：

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实施具有指导性任务的创新化学学习材料，以提高学生的能力

本研究旨在提供一种具有指导性任务的创新化学学习材料，以提高学生的化学能力。它涉及2016/2017学年在棉兰州立大学就读分析化学课程的180名学生。样本被有目的地选择并分为两组。该研究包括几个步骤，包括学习材料的丰富、创新和标准化，然后在课堂上实施开发的学习材料。提供了一套高质量的学习材料，配备了重力测量主题的指导任务。它包含相关的上下文示例、实验室工作、学生活动、多媒体和可信赖网站的超链接。创新学习材料的实施是在实验班使用一套开发的学习材料，而在控制班使用现有的教科书。研究结果强调了几点：（1）实施良好的创新学习材料能有效提高学生的能力；(2)实验班学习成绩高于对照班；(3) 学习包中的引导任务有利于学生自主学习选定的化学主题，从而使学生的学习方式从以讲师为中心转变为以学生为中心；(4)引导式任务不仅使学生熟悉搜索科学文献以完成给定的任务，而且提高了学生写作和组织作业的能力；