This article describes a sensor-based physical computing system, called the Data Sensor Hub (DaSH), which enables students to process, analyze, and display data streams collected using a variety of sensors. The system is built around the portable and affordable BBC micro:bit microcontroller (expanded with the gator:bit), which students program using a visual, cloud-based programming environment intended for novices. Students connect a variety of sensors (measuring temperature, humidity, carbon dioxide, sound, acceleration, magnetism, etc.) and write programs to analyze and visualize the collected sensor data streams. The article also describes two instructional units intended for middle grade science classes that use this sensor-based system. These inquiry-oriented units engage students in designing the system to collect data from the world around them to investigate scientific phenomena of interest. The units are designed to help students develop the ability to meaningfully integrate computing as they engage in place-based learning activities while using tools that more closely approximate the practices of contemporary scientists as well as other STEM workers. Finally, the article articulates how the DaSH and units have elicited different kinds of teacher practices using student drawn modeling activities, facilitating debugging practices, and developing place-based science practices.

中文翻译：

---

支持中学探究科学教学的物理计算系统

本文描述了一个基于传感器的物理计算系统，称为数据传感器中心 (DaSH)，它使学生能够处理、分析和显示使用各种传感器收集的数据流。该系统围绕便携式且价格合理的 BBC micro:bit 微控制器（通过 gator:bit 进行扩展）构建，学生可以使用面向新手的可视化、基于云的编程环境进行编程。学生连接各种传感器（测量温度、湿度、二氧化碳、声音、加速度、磁力等）并编写程序来分析和可视化收集到的传感器数据流。本文还介绍了两个使用这种基于传感器的系统的中级科学课程教学单元。这些以探究为导向的单元让学生参与设计系统，从他们周围的世界收集数据，以研究感兴趣的科学现象。这些单元旨在帮助学生在参与基于地点的学习活动时培养有意义地整合计算的能力，同时使用更接近当代科学家和其他 STEM 工作者实践的工具。最后，文章阐述了 DaSH 和单元如何使用学生绘制的建模活动、促进调试实践和开发基于地点的科学实践来引发不同类型的教师实践。