课堂是学校教学的主阵地,课堂教学是促进学生发展的基本途径。随着新课程改革的不断深入以及信息技术的快速发展,很多教师开始或者已经能够经常使用多媒体设备(主要是电脑、PPT课件、投影机、幕布等)进行教学。但是,传统的电脑、投影仪、幕布等多媒体设备仍存在一定的弊端。不少在课堂上教师时常忙碌于电脑前,眼睛盯着电脑屏幕而无暇顾及学生的反应,缺少与学生之间实时的互动、交 Classroom is the main front of school teaching. Classroom teaching is the basic way to promote students’ development. With the deepening of new curriculum reform and the rapid development of information technology, many teachers have started or have been able to frequently use multimedia devices (mainly computers, PPT courseware, projectors, curtains, etc.) for teaching. However, the traditional computer, projector, curtain and other multimedia devices still have some drawbacks. Many teachers in the classroom often busy in front of the computer, staring at the computer screen and no time to take into account student reactions, lack of real-time interaction with students, pay