Online Chemistry: Problems, Concepts and Contexts

“在线化学：问题、概念和背景”项目正在创建一套基于网络的教学材料，涵盖难以教与学的入门化学主题，包括化学计量学、热力学、动力学、平衡、酸碱化学和溶解度。学生目前花费大量的教学时间来解决这些主题的定量问题。在线材料通过更好地将解决问题与化学概念以及这些概念在现代科学中的应用结合起来，有助于最大限度地提高这段时间的学习效益。教学模块既基于学习科学的更广泛的教学原则，也基于观察学生解决化学问题获得的更具体的结果。特别是，在线教材采用了一种平衡的教学方法，初步结果发现，学生在难题上的表现提高了一倍以上，并为酸碱和其他相关主题的建立奠定了强大的概念框架。这些材料所涵盖的分子科学正成为科学和工程领域日益重要的一个方面。通过为学生提供扎实的化学概念知识，这些模块为学生在多个STEM学科的职业生涯做好准备。这些材料通过网络、会议和出版物广泛传播。由于材料的开发方式允许轻松修改，即使是高度交互的组件，原始作者和社区作为一个整体都可以使用收集到的关于学生如何学习的信息来迭代地改进材料。

Chemistry (12) The "Online Chemistry: Problems, Concepts and Contexts" project is creating a set of web-based instructional materials covering topics in introductory chemistry that are difficult to teach and learn, including stoichiometry, thermodynamics, kinetics, equilibrium, acid-base chemistry, and solubility. Students currently spend a substantial amount of instructional time solving quantitative problems on these topics. The online materials help to maximize the learning benefits of this time by better coupling the problem solving to chemical concepts and to the use of these concepts in modern science. The instructional modules are grounded in both the broader instructional principles of learning science and more specific results obtained from observing students solving chemistry problems. In particular, the online materials implement an instructional approach to equilibrium that initial results found to more than double student performance on difficult problems and that lays a powerful conceptual framework on which acid-base and other related topics build. The molecular science covered in these materials is becoming an increasingly important aspect of science and engineering. By providing students with robust knowledge of chemical concepts, the modules prepare students for careers across multiple STEM disciplines. The materials are broadly disseminated through the web, conferences and publications. Because the materials are developed in a manner that allows for easy modifications, even for highly interactive components, both the original authors and the community as a whole can use the information gleaned on how students learn to iteratively improve the materials.