Document cameras are indispensable teaching tool for the educators to deliver lessons and presentations enriched with the powerful visuals in the classroom. The use of Document cameras for teaching enhances the productivity of the lessons and efficiency of the instructors to deliver lessons. Document cameras add interactivity to the lessons and visualizations of the subjects in the classroom. Document cameras are used to display any text material, slides, negatives or any 3-D object with high resolution clarity. Document cameras are excellent and powerful ICT (information and communication technology) tool to teach and demonstrate more effectively. Document cameras project the thing onto the projection screen, interactive whiteboard, plasma television and computer. The document cameras comprises of video camera that projects documents, objects and images on a variety of display devices such as interactive whiteboard, screen, and television set. Document cameras are most popular ICT (information and communication technology) based teaching aids among teachers these days in the schools, colleges and the universities after interactive whiteboards. Document cameras have a presentation base to place the text or object. Document cameras have a motorised head to allow flexibility in covering the document and objects in both horizontal and vertical direction.
Document cameras have side LED lights and base LED lights for viewing the things in dark room, converting the positives into the negatives, transparencies and slides. Document cameras come with remote control having controls such as zoom, color, and positive/negative, save and recall enhancing the presentations. The instructor can display books, notes and documents to the entire class with the document cameras. Teacher can do live annotations on the paper or use interactive whiteboard to annotate on the real time object with the document cameras. Educator is able to display 3D items such as insects, fossils; geometric solids etc in very minute detail to the students and a specific part can be zoom in or zoom out. Live demonstrations such as how to use a ruler, how to do experiment can be shown to the whole class and these events can be recorded as a real time video with the help of the document cameras. Document cameras are replacing the overhead projectors with the advancement of the ICT (information and communication technology) in to the education. Document cameras have a number of connections to the projector, interactive whiteboard, computer and television. Document cameras can capture images of the documents, 2D or 3D objects and any thing in the real time. The zoom feature of the document cameras allows the students to view the flower components, mould and rocks in minute details. The 2D, 3D objects and other scientific samples can be visually explored as a whole class by the document cameras. Since the document cameras are able to capture the things, there is no need for photocopying. The captured images can be recalled later and can be shared on the network of computers as a resource for learning and teaching. Document cameras can also be used to create 2D or 3D animations. Some Educators integrate interactive response system with the document cameras in their presentations. They can create a question slides embedded with video of science procedure and a teacher asks the student questions about the procedure.
