Close supervision is strongly recommended when students are conducting searches on the Internet. Inappropriate sites are easy to access either by mistake or on purpose. Teachers should generate the vocabulary list for the students in this activity on the Internet. Analyze data collected to conclude which search engine accesses a larger number of web sites.
Most users are unaware of the differences between search engines.
Some sample larger or smaller portions of the World Wide Web than others. A search engine looks for documents containing keywords and returns a list of the documents where the keywords were found. WebCrawler is an example of a search engine. Search engines are different from subject indexes . Yahoo is often thought of as a search engine when in fact it is an example of a subject index.