Online Systems to Support Problem Solving and Learning in Introductory Chemistry

脚手架作业活动为学生提供提示和反馈，根据需要和褪色，帮助适当。结构化对话可以帮助学生分析一个复杂的问题，以确定一个适当的方法，然后，在解决问题的活动结束时，支持他们在连接的经验回到他们的化学更广泛的理解。在执行计算任务时，脚手架可以提供关于学生错误的提示和反馈，并淡化这些提示和反馈，使得学生仍然受到挑战，但不会陷入困境。评估工作支持基于虚拟实验室创建新的问题类型，以改善学生的学习，并强调需要更好的学生解决问题的支架。在线系统根据需要提供帮助，并适当地增加或减弱。我们支持的活动范围从计算程序的实践到参与复杂的真实问题解决，支持结构各不相同，并取决于水平的要求。通过对话促进计算实践和更广泛的化学概念理解之间的桥梁，促使学生反思他们的问题解决和他们所学到的东西。

Scaffolded homework activities provide students with hints and feedback on an as-needed basis and fade that help appropriately. Structured dialogues can help students analyze a complex problem to identify an appropriate approach and then, at the end of the problem solving activity, support them in connecting the experience back to their broader understanding of chemistry. While carrying out a computational task, the scaffolding can provide hints and feedback on student errors, and fade these such that the student remains challenged but does not flounder. Assessment efforts support creating new problem types based on virtual labs to improve student learning and highlight the need for better scaffolding of student problem solving. Online systems provide help as needed and increase or fade appropriately. Activities we support span a range from practice with computational procedures up to engagement in complex authentic problem solving, with the support structures varying and depending on the demands of the level. Bridges between computational practice and a broader conceptual understanding of chemistry is promoted through dialogues that prompt students to reflect on their problem solving and what they have learned.