Collaborative computing, where multiple users work on the same document or project at the same time, allows for high levels of interaction between students in an online program. But finding the tools to achieve the goals of collaborative computing can be difficult and expensive. Recent developments in this area have brought new tools which combine live streaming audio or video with data sharing and, in some cases, application sharing. 合作式计算是多个用户同时处理同一文件或程序,这样可以使学生在联机活动中进行高层次互动。但是要寻求实现合作式计算目的的工具是很困难的,而费用很高。这一领域的最近发展带来了一些结合了现场流式或视频与数据共享的新工具，在某些情况下还可以与应用程序共享相结合。