Computer Studies - Junior Secondary 3 - Search engines

Search engines

Get it on Google Play
Get it on the Apple App Store
  1. Home
  2. Comprehensive Lesson Plan and Notes
  3. Junior Secondary 3
  4. Search engines

Term: 1st Term

Week: 10

Class: Junior Secondary School 3

Age: 14 years

Duration: 40 minutes of 2 periods each

Date:

Subject:      Computer studies

Topic:-       Search engines

SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to

  1. Define search engines
  2. Mention and explain the functions of search engines
  3. List some common examples of search engines

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers, demonstration, videos from source

INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

PRESENTATION

TEACHER’S ACTIVITY

STUDENT’S ACTIVITY

STEP 1

INTRODUCTION

The teacher revises the previous lesson on Internet and computer virus

Students pay attention

STEP 2

EXPLANATION

She defines search engines and mentions some common examples

Students pay attention and participates

STEP 3

DEMONSTRATION

She further discusses the functions of the search engines

 

Students pay attention and participate

STEP 4

NOTE TAKING

The teacher writes a summarized note on the board

The students copy the note in their books

 

NOTE

SEARCH ENGINE

A search engine is a website that helps users for different types of data warehoused within computers on the World Wide Web. Different search engine exist. These include: Google search, Yahoo search, Hotbot and Mamma Search, Safira, Opera, UC browser etc.

 

FUNCTIONS OF SEARCH ENGINES

The following are major functions of search engines:

  1. Crawling: The crawler or web spider is a vital software component of the search engine. Crawlers can scan brand new information on the internet or it can locate older data. Crawlers have the ability to search a wide range of websites at the same time and collect large amounts data.
  2. Indexing: Once the search engine has crawled through contents of the internet, it indexes the content based on the occurrence of keyword phrases in each individual website. This allows a particular search query and subject to be found easily.
  3. Storage: Storing web content within the database of the search engine is essential for fast and easy searching. Larger search engine like Google and Yahoo are able to store large amounts of data ranging in the terabytes.
  4. Results Generation: Results are the hyperlinks to websites that show up in the search engine page when a certain keyword or phrase is queried. When you type in a search term, the crawler runs through the index and matches what you typed with other keywords.

EVALUATION:    1. Define search engine

  1. List five examples of common search engines
  2. Discuss four functions of the search engines

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively