Video lesson

A video lesson or lecture is a video which presents educational material for a topic which is to be learned. Such videos might then be loaded onto the Internet for use as online lectures.

The format may vary. It might be a video of a teacher speaking to the camera, photographs and text about the topic or some mixture of these. The Khan Academy has been successful in teaching mathematics using notes written using Yahoo!'s doodle pad with a voiceover by Salman Khan (educator). These were then loaded onto YouTube where they have been popular and influential. Such lectures are a key part of flip teaching in which the initial work of communicating the essentials of the topic is done by the video lesson.

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Chat room

The term chat room, or chatroom, is primarily used to describe any form of synchronous conferencing, occasionally even asynchronous conferencing. The term can thus mean any technology ranging from real-time online chat and online interaction with strangers (e.g., online forums) to fully immersive graphical social environments.

The primary use of a chat room is to share information via text with a group of other users. Generally speaking, the ability to converse with multiple people in the same conversation differentiates chat rooms from instant messaging programs, which are more typically designed for one-to-one communication. The users in a particular chat room are generally connected via a shared interest or other similar connection, and chat rooms exist catering for a wide range of subjects. New technology has enabled the use of file sharing and webcam to be included in some programs. This can be considered a chat room.

History

The first online chat system was called Talkomatic, created by Doug Brown and David R. Woolley in 1973 on the PLATO System at the University of Illinois. It offered several channels, each of which could accommodate up to five people, with messages appearing on all users' screens character-by-character as they were typed. Talkomatic was very popular among PLATO users into the mid-1980s. In 2014 Brown and Woolley released a web-based version of Talkomatic.

Black

Black is the darkest color, the result of the absence of or complete absorption of light. It is the opposite of white (the combined spectrum of color or light). It is an achromatic color, literally a color without color or hue. It is one of the four primary colors in the CMYK color model, along with cyan, yellow, and magenta, used in color printing to produce all the other colors.

Black was one of the first colors used by artists in neolithic cave paintings. In the 14th century, it began to be worn by royalty, the clergy, judges and government officials in much of Europe. It became the color worn by English romantic poets, businessmen and statesmen in the 19th century, and a high fashion color in the 20th century.

In the Roman Empire, it became the color of mourning, and over the centuries it was frequently associated with death, evil, witches and magic. According to surveys in Europe and North America, it is the color most commonly associated with mourning, the end, secrets, magic, force, violence, evil, and elegance.

New Zealand national rugby union team

The New Zealand national men's rugby union team, officially nicknamed the All Blacks, represents New Zealand in men's rugby union, which is regarded as the country's national sport. The All Blacks are three time winners, and current holders of the Rugby World Cup, having won the inaugural competition in 1987, then won consecutive titles in 2011 and 2015, and are the 2015 World Rugby Team of the Year. They have won over 76% of their test matches and are the leading test match points scorers of all time. Their win ratio puts them amongst the most successful teams of any sport in history. They are the only international side with a winning record against every country they have played, and since their international debut in 1903 only five nations have defeated New Zealand in test matches. Since the introduction of the World Rugby Rankings in October 2003, New Zealand has held the number one ranking longer than all other teams combined. The All Blacks are also the first team to set their hands on the Webb Ellis Cup, the first team to win back to back Rugby World Cups, and the first team to win the cup on three separate occasions.

Round Table

The Round Table is King Arthur's famed table in the Arthurian legend, around which he and his Knights congregate. As its name suggests, it has no head, implying that everyone who sits there has equal status. The table was first described in 1155 by Wace, who relied on previous depictions of Arthur's fabulous retinue. The symbolism of the Round Table developed over time; by the close of the 12th century it had come to represent the chivalric order associated with Arthur's court, the Knights of the Round Table.

History

The Round Table first appears in Wace's Roman de Brut, a Norman language adaptation of Geoffrey of Monmouth's Historia Regum Britanniae finished in 1155. Wace says Arthur created the Round Table to prevent quarrels among his barons, none of whom would accept a lower place than the others.Layamon added to the story when he adapted Wace's work into the Middle English Brut in the early 13th century, saying that the quarrel between Arthur's vassals led to violence at a Yuletide feast. In response a Cornish carpenter built an enormous but easily transportable Round Table to prevent further dispute. Wace claims he was not the source of the Round Table; both he and Layamon credited it instead to the Bretons. Some scholars have doubted this claim, while others believe it may be true. There is some similarity between the chroniclers' description of the Round Table and a custom recorded in Celtic stories, in which warriors sit in a circle around the king or lead warrior, in some cases feuding over the order of precedence as in Layamon. There is a possibility that Wace, contrary to his own claims, derived Arthur's round table not from any Breton source, but rather from medieval biographies of Charlemagne—notably Einhard's Vita Caroli and Notker the Stammerer's De Carolo Magno—in which the king is said to have possessed a round table decorated with a map of Rome.