ABSTRACT This article examines patterns of classroom organisation and interaction associated with the use of a particular type of digital technology – the dynamic software GeoGebra – in the lessons of an opportunity sample of three English secondary-school mathematics teachers. The concept of activity structure is used to organise this study, further informed by the concept of instrumental orchestration. While the case study analysis identifies structures already reported in those earlier papers, it also draws attention to the prevalence of a Predict-and-test format in tasks carried out by students at the computer. This study also shows how synthesising the activity structure and instrumental orchestration frameworks may be productive.

中文翻译：

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技术型数学课的活动结构——以英语中学三位教师为例

摘要 本文研究了与使用特定类型的数字技术（动态软件 GeoGebra）相关的课堂组织模式和互动模式，该模式在三位英语中学数学教师的机会样本课程中进行。活动结构的概念用于组织这项研究，并进一步由乐器编排的概念提供信息。虽然案例研究分析确定了那些早期论文中已经报告的结构，但它也引起了人们对学生在计算机上执行的任务中普遍存在的预测和测试格式的关注。这项研究还展示了如何综合活动结构和乐器编排框架可能是富有成效的。