The history function of the browser means a copy of the pages you have visited recently is stored as a temporary file on your computer. It makes looking at pages again very quick and easy.
The browser uses a pre-set section of your hard drive to hold thee copies and, as you view more and more web pages, it continuously re-uses this space. You can set how much of your hard drive is allocated to storing temporary Internet files and how long it holds copies for.
This is especially relevant for students using computers once or twice a week.
If the history function is set to hold files for two days, it will be blank when a student logs back on. To re-set it to seven days, open your browser, click Tools, then Internet Options and then reset the information in the History section.