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A head teacher, headmaster, headmistress, head, chancellor, principal or school director (sometimes another title is used) is the staff member of a school with the greatest responsibility[ for the management of the school.In the past, the headmaster or headmistress of a British public school was often the owner of the school or a member of the owning family, and the position often remained in the family for many generations.In Scotland, the holder of this position is sometimes known as the "rector"; however, usage of this term mainly applies to independent schools. The slang term "heidie" is seldom used in Scotland today, and most Scottish schoolchildren now refer to their head teacher as "the head". In North America, Australia, New Zealand, Hong Kong and Ireland (including Northern Ireland), the position holder is usually known as the "school principal", but some schools, primarily independent schools (called "private schools" in North America), use the term "headmaster" or "head master". 

As in Scotland, the term "rector" is still in use in the United States in private religious schools, as by tradition the head of school was also a priest. Some American state schools (called "public schools"), such as Boston Latin School, Brooklyn Latin School,[citation needed] and Milpitas High School,[citation needed] also use the term "headmaster", either because of the schools' history or historical connections.In the UK, the terms "headmaster" and "headmistress" used to be the formal titles in most state schools as well as private schools, with "head teacher" only being used as a term to refer to them collectively. In recent years, however, most state schools have switched to the gender-neutral "head teacher" as the official title. 

Nevertheless, the gender-specific terms are still commonly used in day-to-day speech and are still the official titles at some of the remaining state grammar schools and most private schools. Some use other terms, such as "high master". In South Africa, independent schools and the majority of state schools use the gender-specific terms "headmaster" and "headmistress" when addressing their head teachers."Principal" or "head of school" is often used as the title of the head administrator of an elementary school, middle school, or high school or boarding school in some English-speaking countries, including the United States, India, Australia and New Zealand. Public schools in the United States generally use the title "principal" whereas private schools in the United States sometimes use the title head of school.
[citation needed] source : wikipedia

Videotelephony comprises the technologies for the reception and transmission of audio-video signals by users at different locations, for communication between people in real-time. A videophone is a telephone with a video display, capable of simultaneous video and audio for communication between people in real-time.Videoconferencing implies the use of this technology for a group or organizational meeting rather than for individuals, in a videoconference.  Telepresence may refer either to a high-quality videotelephony system (where the goal is to create the illusion that remote participants are in the same room) or to meetup technology, which goes beyond video into robotics (such as moving around the room or physically manipulating objects). Videoconferencing has also been called "visual collaboration" and is a type of groupware.
INNOVATION BABAT LATEST GR 
EDUCATIONAL INNOVATION FAIR BABAT GR
LATEST GR ABOUT EDUCATIONAL INNOVATION FAIR 201920
NAVTAR PRAYOG INNOVATION FAIR
GCERT NAVTAR PRAYOGO 201920

At the dawn of its commercial deployment from the 1950s through the 1990s, videotelephony also included "image phones" which would exchange still images between units every few seconds over conventional POTS-type telephone lines, essentially the same as slow scan TV systems.
 The development of advanced video codecs, more powerful CPUs, and high-bandwidth Internet telecommunication services in the late 1990s allowed videophones to provide high quality low-cost colour service between users almost anyplace in the world that the Internet is available.