The usage of blackboard in classroom had its own evolvement and development process. As a teaching tool that can be used repeatedly , it originated from the apply of the sand plate or slate by the ancient scholar. Following the invention of paper, the writing and painting tool became pencil and paper domestically while abroad in Europe feather pen and paper. In consideration of the expensiveness and one-time using shortcomings, the self-made and cost-efficient sand plate or slate still existed in modern times. Digging into details, for the sand plate, first to put some sand in the flat plate, then scatch on it by the use of stick or branch, and when you flattened the sand , you could wirte it repeatedly. While for the slate, it was made of special stone meterial, when you wrote or scratched on it , that could be easily eliminated so that it could be used several times.

Soon, it came the use of the pencil and paper in stead of the sand plate or slate, and then pen and ball-pen. The pictures or writings made from pencil can be erased off within limited times, but it was not for the use of pen and ball-pen. Whatsoever, the relative tools applied in classroom must meet the requirements such as presentation in face of the student, used repeatly, cost-effcient so the invention and development of the blackboard and chalk found its own foundation in the technical, educational and economical background.

Since the modern times, the blackboard and the chalk already established a stable status in the traditional teaching in schools. Professor Yu,from Communication Institude of Hong Kong Chinese University,once pointed out that, most teachers from the traditional schools still believe that the success of the study, mainly depends on the teacher while not the teaching material and the method.

It occured many excellent educators in the world, such as Confucius, Plato and Aristotle, all adopted the simplest face-to-face instruction,except the language itself, none of new technical medias were concerned.

Lots of great men appeared in latest centuries also educated in the extremely crude classroom, except the textbook and the blackboard, there was no any medias there; (Yelu Yu, 1982). Halas and Harris,from US, also pointed out that,since several centuries,people all believe that, in the communication, the character is more superior than the visual image, and, the character contains the high wisdom and the thought.Now the faith still the basic for the education in the developed countries (Halas and Harris, 1982). This kind of faith,with three tradition core systems concerning the teacher, the textbook and the classroom implemented in the modern schools, formed a very complicated relationship. Simultaneously, it also indicated that the blackboard and the chalk were already stood several centuries' test as the mainstream technology in traditional classroom teaching.

Since last later century, we have experienced from the blackboard to the electronic interactive tabula evolution.This process mainly came through the following three steps:
1.From blackboard to written tabula

2. From written tabula to electronic tabula
3. From electronic tabula to interactive tabula

First, in order to avoid the dust violating to the teacher and student's health, various of dustless chalks began to be used and improved, but the effect is not so good, thus, the written tabula was adopted.The written tabula was made by various of materials (lumber, metal, plastic plate and so on),accordingly, kinds of colored written pen was also used,and so did the specially made eraser for cleaning the calligraphy and painting content. Nowadays, there are still massive written tabula used in the different countries, by anyway, not a common throughout,especially in the elementary and middle schools.The deep reason caused that written tabula is not a patch on chalk, probably due to the following aspects: the market is for the teachers and students, moreover, chalks are easier for recycling and meanwhile lower cost.

Till the end of last century, the written tabula rasa developped to be the electronic tabula rasa. At the very beginning,the electronic tabula rasa was provided the written tabula rasa with electronic installation, that may save the calligraphy and painting content and which was printable and can be distribute to the students or the receivers. Afterwards, the calligraphy and painting content on the electronic tabula rasa can be reserved into the computer and then further processed and the transmited (such as email).Certainly, the electronic tabula rasa also can be used as the projection screen board of the computer.But at that time, the electronic tabula rasa and the computer reciprocity is always unidirectional.

（ 1 ） The calligraphy and painting content on the electronic tabula rasa can be reserved into the computer and then further processed and the transmited (to be possible to realize from electronic tabula rasa to computer calligraphy and painting content unidirectional memory), but the computer processing result does not present in the electronic tabula rasa, say,the calligraphy and painting content of electronic tabula rasa do not change along with the change of processing(can not realize the reversion from computer to process the calligraphy and painting content of electronic tabula rasa)
（ 2 ）The computer may project its screen content onto the electronic tabula rasa through the projecting apparatus (may realize the unidirectional projection from computer to screen content of electronic tabula rasa), but it's unable to make any processing or operation for the projection of computer screen content on the electronic tabula rasa, at this moment the electron tabula rasa is just like an ordinary screen board (cannot realize the reversion operation from electronic tabula rasa to computer processing of screen content.

Just because that the electronic tabula rasa and the computer is unable to realize alternate and bidirectional corresponds and operation, thus makes the application promotion of the electronic tabula rasa falling under the significant limit situation.In the teaching practice, the electronic tabula rasa might be the lower used compared with the writing tabula rasa.

Developments from the electronic tabula rasa to the interactive whiteboard, it is a key step in tabula rasa history.The interactive whiteboard has realized the alternate and bidirectional corresponds and the operation between the tabula rasa and the computer. The interactive whiteboard is not only a electronic tabula rasa,also a computer screen. The calligraphy and painting content and the processing result on the interactive whiteboard are saved in the computer, simultaneously, may fulfill various of operations of computer on the interactive whiteboard, all operations and possessing result to the content on computer screen can be saved in computer instantly and present to the electronic whiteboard. Certainly, interactive whiteboard itself also experienced of the process of self-improvement and self-perfection,and which is still in processing and not yet end.
But, after several years innovation of technical designs and the improvement of practice on application, the present interactive whiteboard already shaped, and sufficiently substituted the traditional blackboard,taking on the heavy responsibility of mainstream technology in the classroom instruction of elementary education informationization advancement.
Then, what on earth is the interactive whiteboard? Interactive whiteboard is the electronic induction whiteboard (hardware) and the whiteboard operating system (software) integration.It is merged of the computer technology, the microelectronic technology and the electronic communication technology, becomes the computer one kind of input-output device, becomes the intelligent platform for alternating between the human (user) and the computer. In short, the interactive whiteboard is the one which has the normal blackboard size, works under the support of software and hardware of computer, both have the ordinary whiteboard and the networking multimedia computer function, and may realize the ordinary whiteboard function and the computer function, as well as the software and hardware function and the education resources, and the electronic induction screen board for interpersonal multiple interaction between human and compute .

Success in UK , for Interactive Whiteboard
Charles Clarke,present minister of education of UK , at his speech of the opening ceremony in Britain Educational Technique exposition (BETT), stongly recommended to take the interactive whiteboard as the successful model for Britain 's elementary education application of electronic information communication . In his short speech, directly mentioned the interactive whiteboard for 12 times, 5 times for interactive whiteboard, 4 times for Electronic Whiteboard, 3 times for Whiteboard,and also some other pronouns indicated the interactive whiteboard.I have been hugely impressed myself by the use of electronic whiteboard technology. ）。”Clarke did not cover up his favorite to the interactive whiteboard, “I have been hugely impressed myself by the use of electronic whiteboard technology.” He described his own experience and the truth based on the teaching practice, “I myself experienced the exciting moment by using the whiteboard in classroom teaching. The children participate in the study by different ways, this is what I mentioned in the research which pointed out by Lankus university. I strongly believed that, the interactive whiteboard is one kind of tool, it may help the teacher organize an exciting class and students of different ages and abilites to take full participation in classroom teaching.Now the teacher may have an exciting and a rousing ways to organize the whole teaching in the course, the teacher and students can get magnificent benefits from the interaction between students and students, teacher and students,teacher and the whiteboard, no matter the concrete environment is.”

“Teachers may use different ways to enrich the courses education by using interactive tabula rasa, it might be segment of movies, internet, multimedia show, visual color, and the skills in habit of traditional blackboard, etc. Interactive will show documents, entity and calculation. In my opinion, it is encouraged for inspiriting study motive and clearing in cognize result through out presenting and keeping the knowledges in mind by using interactive tabula rasa technology in some of the knowledge area, especially in maths and science.” Minister 克拉克 says, “I am now announce that to increase the new appropriate funds for installing interactive tabula rasa. It means there will be more elementary and secondary schools benefited from this technology. I've already settled down the financial budget for 2003 -04 in 25 million pounds, and there will be another 25 million punds budget for 2004-05. The budget will enlarge our schedule for interactive tabula rasa for elementary and secondary schools. So that to continue the successful implemented projects from 2002 to 2004.” DFES and TTA will imburse a training project for new teachers along with this budget. So that to help the fresh graduated college students to buy the interactive tabula rasa and peripheral equipments and to take the education training for using the interactive tabula rasamore effectively.

In the past few years, english univercities and education research orgnizations have presented a lot of investigation production, reports and studies by cooperating with elementary and secondary schools throughout a mass of experiment and investigation. Thereinto, some famous such as project ImpaCT2 and ImpaCT3 studies by BECTA, projects by Newcastle University, Lancaster University and Warwick University, and some education reform and education experimental research in english elementary and secondary schools and related areas. It is indicated in the investigation report 2003 of BECTA that interactive tabula rasa is more convenience to show the operation process of the softwares and internet, so that to display the dynamic and details of the teaching materials. It can be remounted to the operation process and details if necessary. And also, it improves students' learning interests and self-awareness, encourages students to take part in and communication. It provides more opportunities for students to improve their ability of using information technology and cummunication skill in classroom collaboration study. It strongthens students' confidence by showing their abundant imagination, creation and productions in front of teachers and classmates. It is better for children and handicapped students to attend to the lessons by writing on the tabula rasa directly but not using a keyboard(BECTA, 2003). It is showed in the new research report of interactive tabula rasa of Lancaster University that how does this technology work and how to encourage students to learn. The collaboration for interactive tabula rasa and numbers contents increase effection of courses education and encourage students to study by presenting, explaination and dealing with the content of teaching and studying.

Interactive whiteboard, worldwide.

Till 2004, The most widely used country in application of the interactive whiteboard technology is England , even more than the tatal amount around America , Canada and south America. In England, there have been about 80% high and elementary school equiped with the interactive whiteboard,,approximately, with 111.000 units of classroom up to 15% of the tatality in England, inbetween, this system have been completely installed in all the classrooms of more than 300 schools and all the newlly-built classrooms. According to the relative stastics done during the springtime of 2004, 90% of all the elementary school headmasters have approved on the huge push force in the teaching session after the adoption of the new technology. A variety of them have held lots of activities to promote and push it and have built up a schoolwide network to have a further communication on it. In view of the talk of the administor Mr Clark, the England goverment have directly cut its budget into the application of new technology from 2003. It is said from some research report that the introduction of the application of personal computer into American high and elementary school have not reached the expectation as some experts anticipated, due to its positive effect of the technical adaptation and its expensiveness.

1.Technical Integration: Interactive tabula rasa is the best integration of the current technology of classroom teaching, including digital technology, computer technology, internet technoloty, multimedia technology and video/radio technology. Obviously, the equipment of Interactive tabula rasa is better than the current popular media classroom. Moreover, it can be installed in the laboratories, internet classroom, sound laboratory, electrical classroom, electrical library, etc. Interactive tabula rasa enriches the function of these basic establishments. It enriches the education effection of big classroom or amphitheatre if it is used along with the multimedia projection with a big screen. Furthermore, once the Interactive tabula rasa installed in the classroom, it is available to fit out with computers/laptops for students/groups and internet is also available for all computers/laptops. So as to active the classroom teaching mode.

2,Resource conformity: Interactive tabula rasa realizes flexible conformity for varies education resources. The original computer and internet resources (including computers and internet software coursewares, playing varies multimedia discs and radio/video materials, etc.) can be called in the interactive tabula rasa's computer interface and you can call the inner resource datasheets directly. The resource datasheets are active wall map resource datasheet, remarks datasheet, super coupling datasheet, cartoon datasheet and so on. The active wall map resource datasheet inclusive of 2 parts, sharing datasheet and professional datasheet. Whichever the datasheets, it can be divided into documentation sheet, page layout sheet, background sheet and picture sheet. Every resource datesheet can be established its tree catalog. They were further classified by subjects and classes so that more convenience for search and call. The teachers and students can continuously adjust, modify, add till the inner resource datasheets be reconstructed according to their own requirements. The structure does not only protect teachers' intellectual property rights, but implement resource share which affirmatory by special education group. Furthermore, interactive tabula rasa supports spot creating and reworking for education resources in class communication between teachers and students. So that to form and cumulate reusable new and fresh education resources endlessly.

3.Interactive platform: Interactive tabula rasa provides an interactive platform for teacher and student, student and student, teacher&students and resources, this class' teacher&students and that class' teacher&students and professionals. It promotes varies communication actives. This is the most valuable character for teaching and studying in the classroom by the technical integration and resources conformity basis of interactive tabula rasa. It is also shows the huge advantage and core competence when comparing with other information technical equipments which is used in the classroom teaching.

4.Collaboration environment: Interactive tabula rasa supports to establish a collaboration environment for classroom teaching and studing. Teaching and studying part and behavior for teacher&students changes actively. In the stage of interactive platform which provided by interactive tabula rasa, you can start a collaboration teaching and studying on the basis of abundant teaching resource. In the collaboration teaching environment of interactive tabula rasa's classroom, it is propitious to exert teachers' guidance and supervise study. And also, the teacher may control the process of teaching more flexible. In the meanwhile, it is propitious to students exert to primary learning plenary. The students will show their more attendance and collaboration, energy and cohesiveness.

5. Closer to teacher&students: Interactive tabula rasa is much closer to teacher&students but not make them feel afraid. It is much easier for domestic elementary and secondary school teachers&students to hobnob with cause interactive tabula rasa is almost the same as blackboard and touchscreen on the surface and operation, you don't need to take strict professional training for it, it is easy to learn and use. It is available for ordinary uses and exclusive uses. Especially for those senior liberal arts teachers who is not so familier with computer and internet or even be afraid of it. They will be confidence with the interactive tabula rasa and start to use in simple ways and get into skilled slowly. Meanwhile, it is better for children and handicapped students to attend to the lessons by writing on the tabula rasa directly but not using a keyboard. Moreover, interactive tabula rasa is more convenience to show the operation process of the softwares and internet, so that to display the dynamic and details of the teaching materials. It can be remounted to the operation process and details if necessary. And also, it improves students' learning interests and self-awareness, encourages students to take part in and communication.

6.Traditional innovation: It shows the combination of tradition and innovation for using interactive tabula rasa in the classroom teaching. The traditional classroom teaching mode of using blackboard and chalks has been proofed by the world classroom teaching practice for all courses. Interactive tabula rasa does not only inherit and develope this benefit, but also fathoming and innovating for comformiting for information technology and courses classroom teaching, and band them together to bring out the best in each other. It can not be implemented by any other information technology equipment for classroom teaching, including multimedia classroom and internet classroom.

7.Normal usage: Interactive tabula can be used in daily courses classroom teaching. Currently, multimedia classroom and internet classroom(computer room) are becoming the main direction of basic equipments establishment for school information, and it seems to be the main technology and basic configuration for classroom informationization establishment of using computer and projection and screen, which is an error zone of our basic education informationization. The result is, some of the teachers play power points and multimedia courseware as an assistant of classroom teaching which instead of the traditional blackboard with chalks teaching mode. Since its teaching effect might not be compared with traditional classroom teaching, most of the teachers are still using blackboard with chalks for classroom teaching. Using interactive tabula rasa will destroy the error zone. And it will become the first consideration for normal classroom teaching of most teachers in elementary and secondary schools, so as to become the primary option for education conformity of information technology and courses. This developing direction will not accomplish in an action, but take the lead in implementing by advanced schools in developed area, so as to push the remote and border areas to implement.

8.Multi mode: Since interactive tabula rasa adapts varies mode of teaching and studying in classroom, it implemented the deversification of the education structure. The theory of education and teaching practice and education science, psychology science and studying science shows there're many structures and modes for teaching and studying. They're existed in a comparing mode and they have their own value direction, and their own advantage and weakness. You can not simply divide them into right or wrong, advanced or draggle, fresh or out of time. Classroom teaching of interactive tabula rasa not only adapts a teaching mode and structure of focus on teacher and teaching, but also adapts the teaching mode and structure of focus on students and study. Not only be used in enhancing instruction teaching, but also be used in promoting collaboration teaching, automatically study and investigation study, etc. Interactive tabula rasa owns a bigger adaptability and flexibility in implementing the deversification of the education structure when comparing with current used other information technology equipments of classroom teaching(including multimedia classroom and internet classroom).

9.Education design: Although interactive tabula supports to establish a collaboration environment for classroom teaching and studying which includes advantages of high technical integration, strong resources conformity, good communication function, hobnob with teacher&students, easy to implement the combination of tradition and innovation, adapting to varies teaching structures and modes, adapting to courses daily teaching and so on, the main factor of classroom teaching's success depends on the teaching design and teaching practice of the teacher, also depends on the activity and collaboration of the teacher&students in the classroom teaching. Therefore, it is necessary to enhance knowledge accomplishment, pedagogics, courses teaching method accomplishment and ability training&professional development for information technology accomplishment of the teacher. In the area of teachers developing, interactive tabula rasa also provides a strong stage, environment and tool for teachers training and teaching&researching actives.

10. Investment benefit: Interactive tabula rasa is a better choice with its higher investment benefit in current basic teaching informationization. There're many elementary and secondary schools which locaded in our big/middle sized cities and east economic advanced area have established school LAN, electrical library, internet classroom and multimedia classroom. There's not much investment for changing the screen to interactive tabula rasa in some of the multimedia classroom and internet classroom and the effection is prominent. It is a better choice with higher investing benefit to implement the equipment establishment of information technology of our basic education from widely used among schools till last among classes.

In conclusion, we can speak out with great confidence in above 10 items basis, interactive tabula rasa will surely become the ‘effective and feasible main technology of informationization for classroom teaching of elementary and secondary school, and information technology and courses education conformity', ‘becoming the standard rules of the construction for future classroom design of elementary and secondary schools', so as to push the process of informationization of school education.