In today's society, with the improvement of social economic development level and the advancement of technology, computer multimedia teaching has become a prevailing trend. Computer multimedia teaching has the advantages of being direct, convenient, having a large classroom capacity and good effect. However, its disadvantages are that it requires a lot of time to prepare courseware before class, which is a heavy workload. For teachers who are not good at computer operation, it is difficult to create courseware, and it takes a lot of time. Moreover, it is also difficult to implement effective classroom evaluation in the classroom teaching.
In classroom teaching, teachers often need to project and display a large number of teaching charts, students' homework, classroom exercises, learning outcomes, etc. in real time for combined presentation of pictures and text, calculation, drawing analysis and timely and effective classroom evaluation. These are all things that multimedia courseware is not good at. Making full use of the functions of the real object projector is a simple and feasible good solution to this problem. However, due to the problems of traditional real object projectors such as high price, large space occupation, complex operation, insufficient clarity, insufficient functions, and inability to switch with computer multimedia conveniently, many traditional real object projectors that were once widely used are rarely applied in current classrooms that mainly adopt computer multimedia teaching. Many schools even no longer equip with traditional real object projectors.
Similar to the physical projector but with lower price, smaller size, portability and ease of use, and more functions and capabilities than the physical projector, the "digital physical projector" - the high-speed scanner - has emerged. Its appearance can effectively address the shortcomings and deficiencies of traditional physical projectors and can effectively achieve mutual coordination and complementary advantages with computer multimedia teaching. It provides technical support for transforming the current classroom teaching mode and improving classroom teaching efficiency.
—, Introduction to the High-Resolution Scanner
A high-speed camera scanner, also known as a high-speed video camera, a speed scanner or a lesson-preparation assistant, is a newly developed portable digital office accessory. It is convenient to carry and use, has a low price, and can be connected to a computer via a USB interface. With the help of the driver software on the connected computer, it can perform a series of functions such as physical display, electronic whiteboard, high-speed scanning, taking photos, video recording, copying, network paperless faxing, creating e-books, trimming and straightening edges, etc.
II. Examples of the Application of High-speed Scanner in Education and Teaching
High-speed scanners have been widely applied in numerous schools with remarkable results. Next, the editor will take the Fenglin high-speed scanner, which is used by many school teachers, as an example to specifically discuss the application of the physical exhibition stand function, video recording function, screenshot function, scanning management function and computer desktop function of high-speed scanners in classroom teaching. Figure 2 shows the interface of the Fenglin high-speed scanner driver program - Fenglin high-speed scanner application software. Before using the high-speed scanner, it is necessary to install the Fenglin high-speed scanner driver program.
Function of the physical exhibition stand - Projecting textual materials
The physical exhibition stand of the high-speed scanner is similar to that of the traditional physical projector in function. The difference is that the high-speed scanner can be connected to a computer and operated through a graphical software interface. It can present text materials (such as textbooks, supplementary teaching materials, classroom exercises, test questions, student homework, student learning outcomes, etc.) to the projection screen in real time, and also display dynamic processes such as calculations and experiments in real time. Moreover, the software comes with a toolbar that enables multi-point movement, zooming, rotation, etc. The operation is simple and convenient, and it is small in size, light in weight, inexpensive, and easy to carry. Compared with the traditional physical projector, it is more advanced, more convenient, and has more powerful functions, and can well replace the classroom teaching function of the traditional physical projector.
2. Video Recording Function - Record Teaching Micro-videos
At present, micro-lessons (micro-video) teaching is receiving increasing attention from educational circles in various countries. The application of micro-video in classroom teaching is also becoming more and more widespread. The video recording function of the high-speed scanner can promptly record the teaching operations and explanations of teachers on the computer screen as video files. It can also record the dynamic processes such as real-time demonstrations, various annotations, analysis and calculation, demonstration drawing, experiments, etc. of teachers on the physical display table. These video demonstrations can be saved in the form of videos before class or recorded simultaneously and in real time during teaching, without affecting normal teaching.
The video recording function of the high-resolution scanner can be utilized in classroom teaching to record teaching micro-videos. For the key and difficult knowledge that students have not yet fully mastered in their regular classroom teaching, students can conveniently and repeatedly watch the recorded micro-videos at any time for differentiated self-study and review, thereby reducing the pressure on teachers to repeatedly explain a certain knowledge point and on students to repeatedly ask the same question.
3. Quick Capture Function - Facilitating Comparative Teaching
The quick capture (photographing) function of the high-speed scanner enables the rapid capture or photography of text materials onto the computer desktop or the currently edited PPT, WORD document. Combined with the comparative teaching mode in the physical exhibition stand function of the high-speed scanner, this function can be used conveniently for real-time projection display of the same topic in different types of text materials during classroom teaching. This is used to achieve comparative teaching, especially for comparing aspects such as the comparison between students' learning outcomes, and the comparison between students' learning outcomes and reference cases. Projecting and displaying students' homework, exercises, test questions, as well as students' classroom or after-class learning outcomes, facilitates teachers' effective evaluation of students' learning situations, thereby better serving classroom teaching.
4. Scanning Management Function - Collecting Electronic Teaching Materials
The scanning management function of the high-speed scanner enables rapid high-resolution scanning of text documents within A3 paper size and can perform OCR recognition on the scanned documents, converting text and images into editable WORD documents. In teaching, it can be conveniently used by teachers to collect various text teaching materials and convert them into editable WORD electronic documents, thus preparing various editable and reusable teaching materials for future classroom teaching.
5. Computer Desktop Function - Real-time Switching between Multimedia and High-Resolution Scanner Teaching
The computer desktop function of the high-resolution scanner enables quick and convenient switching between the computer desktop and the interface of the high-resolution scanner teaching assistant software. In classroom teaching, it can be efficiently and conveniently utilized to release the computer desktop and conduct real-time switching and display of high-resolution scanner teaching and multimedia teaching. It can also display the teaching materials such as documents and videos that have been prepared in advance in the computer, thereby better achieving the smooth switching, connection and coordination between high-resolution scanner teaching and multimedia teaching.
To sum up, in classroom teaching, the functions of the high-speed scanner projector such as the physical display stand, video recording, screenshot capture, scanning tube embedding, and computer desktop have extensive and practical applications in projecting text materials, analyzing graphic and textual materials, recording teaching micro-videos, comparing teaching, collecting electronic teaching materials, and achieving the coordination of multimedia and high-speed scanner projector teaching.