ict

Stage

Time

Teacher activity

Student activities

Methods, forms, teaching aids

Organizational

2 '

Good afternoon guys! My name is, as you should already know, Konstantin Evgenievich, and again I will give a lesson in informatics, everyone is ready, well, let's start studying the material.

Listen to the teacher

C: teacher's voice

M: verbal

F: frontal

Motivational

3 '

So in today's lesson for about 20 minutes, let's talk about the World Wide Web, consider definitions such as:

·         WWW - World Wide Web

·         Web page, Web site

·         browser

·         search system

·         search query

After that, we will carry out the final control on the already studied material

Listen to the teacher, write down the topic of the lesson in a notebook

C: Teacher's voice, slide presentation

M: verbal

F: frontal

Knowledge update

Listen to the teacher, write down the topic of the lesson in a notebook

C: Teacher's voice, slide presentation

M: verbal

F: frontal

Learning new

20'

Well, we open notebooks and write down the topic of our lesson: WWW - World Wide Web.

What is WWW

Free access to information, regardless of borders and distances, has become possible thanks to the World Wide Web (WWW, Web) - a worldwide repository of information that exists on the technical basis of the Internet. You may already have experience with the WWW.

WWW, or the World Wide Web:

•   is a set of information resources organized into a single whole;

•   brings together numerous resources located in computers around the world;

•   organized in such a way that information resources are not presented in a linear sequence, but are provided with links (hyperlinks) that clearly indicate possible transitions, connections between resources.

The World Wide Web is a powerful information storage; the amount of information contained in it cannot be accurately measured. WWW contains information of a very different nature;

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You can find there:

•   the latest news - political, economic, cultural, sports;

•   scientific, technical, educational and reference information of absolutely any kind;

•   advertising of various goods and services;

•   resources for leisure and entertainment - books, music, films, games and much more.

Anyone with access to the Internet can post their information on the network, and the whole world will have access to this information.

Information on the WWW is organized in the form of pages (Web pages).

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Webpage (EnglishWeb page) - document or information resource World wide webaccessed withweb browser...

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A web site is a collection of web pages that are linked by content.

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Government agencies, public organizations, enterprises, firms and companies, museums and libraries, newspapers, educational institutions, including many schools have websites.

Each site and each page has its own address where you can refer to them. Web sites vary greatly in design, but most often they have a similar structure. Each Web site has a home page, which is similar to a table of contents page in a book.

In the texts placed on the pages of sites, keywords can be highlighted - hyperlinks from which the hyperlinks go. They are highlighted with color or underline. By clicking on such a word, we move on to viewing another document, and this document may be on another computer, in another country, on another continent. Not only text, but also any graphic image can be used as hyperlinks. This organization of information is called hypertext.

Special programs help the user navigate the "web" (Web-browsers, English "browse", "examine", "study")

The logos of the most common browsers - Mozilla Firefox, Google Chrome and Internet Explorer

At first glance, the World Wide Web can be thought of as a library in which books are arranged in no apparent order: there is no single directory system, no librarians. In this case, visitors to the "library" at their own discretion add new volumes or irrevocably take them. In order to extract useful information from the World Wide Web, you need to know where and how to search, you need experience in search work.

Searching for the required document in the WWW is done using the browser in different ways:

•   by specifying the address of the document;

•   by navigating the web of hyperlinks;

•   by using search engines.

Search engines

All information retrieval systems on the World Wide Web are located on specially dedicated computers with powerful communication channels. They serve a huge number of clients every minute.

The action of search engines is based on a constant, consistent study of all pages of all sites on the World Wide Web. For each document, its search image is compiled - a set of keywords that reflect the content of this document. Due to the constant updating of information, search engines periodically return to previously studied pages in order to detect and register changes. Information about the keywords of the pages researched in this way is saved in the search engine.

Upon receipt of a request from a user, the search engine, based on the information available in it, generates a list of pages that meet the search criteria. Found documents, as a rule, are ordered according to the location of keywords (in the heading, at the beginning of the text), the frequency of their occurrence in the text, and other characteristics.

There are many search engines. Despite the general principle of operation, search engines differ in query languages, search zones, depth of search within a document, methods of organizing information and other characteristics. The most popular search engine in the world is Google. The largest domestic search engines are Yandex, Rambler.

Address: www.google.com

The fastest and largest search engine. Contains information on more than one and a half billion pages. There is a choice of language. Assesses the popularity of a resource by the number of links leading to it from other pages.

Address: www.yandex.ru
Powerful domestic search engine. Provides search, mainly
di of Russian-language resources, while the capabilities are not inferior to foreign ones. All systems will be found. Conducts a qualitative analysis of information, taking into account the word forms of the Russian language.

Address: www.rambler.ru

One of the first Russian search engines. In addition to the standard search capabilities, the site has a rating catalog of resources.

Search queries

When starting a search, the user enters one or more keywords and selects the type of search. Most search engines have three main types of search:

1)   search for any of the words - the search result is a huge list of all pages containing at least one of the keywords; can be used when the user is not sure about the keywords;

2)   search by all words - in this search mode, a list of all pages is formed, containing all keywords in any order;

3)   exact phrase search - the search results in a list of all pages containing a phrase that exactly matches the key phrase (punctuation marks are ignored).

If too many pages are found, then you can add another keyword and repeat the search. For this, many search engines have a search function among those found. You can also enter search queries using logical connectives, similar in meaning to the unions “and”, “or” and the particle “not” of the Russian language (Fig. 1.13).

The meaning of logical connectives becomes clearer if you illustrate them using a graphical diagram - Euler circles. Let's imagine a set of documents in which the keywords "canaries", "goldfinches" are present, as two circles on a plane, which we will place inside a circle representing all WWW documents.

They listen to the teacher, answer the teacher's question, write in the notebook.

C: Teacher's voice

M: verbal, visual - illustrative

F: frontal, individual.

Primary anchoring

five'

Children answer the question posed: color - yellow, taste - sweet, composition - liquid.

C: Teacher's voice

M: verbal, visual - illustrative

F: frontal, individual.

Consolidation of new knowledge

ten'

Perform verification

Verification

Lesson summary

2 '

I listen to the teacher. Answer questions

C: teacher's voice

M: verbal

F: frontal