ODWS icon

The Open Door Web Site
  The Open Door Web Site is non-profit making. Your donations help towards the cost of maintaining this free service on-line.



Source Material

The Natural Science section is an adaptation of two books which were published in the early 90's and a from 1998 publication.

Paul Billiet, Shirley Burchill. 1990. Discovering Natural Science. Paris, France: REMI.

Paul Billiet, Shirley Burchill. 1991. Advancing in Natural Science. Paris, France: REMI.

And the following internal publications

Paul Billiet, Shirley Burchill, Alan Damon and Deborah James. 1998 Having Fun in Natural Science. Paris, France, REMI.


The History section is an adaptation of three books that were published in 1995.

Richard Gale, Nigel Hughes, Keith Woodall and Shirley Burchill. 1995. The Shaping of Modern Europe. Paris, France, REMI.

Richard Gale, Nigel Hughes, Peter Price, Keith Woodall and Shirley Burchill. 1995. Britain: Island State to Empire. Paris, France, REMI.

Nigel Hughes, Peter Price, Keith Woodall and Shirley Burchill. 1996. Two Centuries of Revolutionary Change. Paris, France, REMI.


Making Use of the Questions

The questions and practical work sheets are best used by opening the corresponding PDF file. For this you will need to access the free download, Adobe Acrobat Reader.

Once viewed in Adobe Acrobat reader the files can be saved and printed.

There is also an HTML version of each biology question which can be saved from screen. However, for those questions which included images, each image needs to be saved in order to work with the HTML file. The advantage to this method is that the questions can be answered on screen by calling the HTML file into a suitable word processing programme. Work can then either be printed or e-mailed to the teacher (as a .zip attachment if there are images). If the work is to be printed remember to put page headings on each separate page.


A Note About Spelling

We have tried to be consistent with spelling! The Open Door Web Site uses British spelling in general. The team, however, is multi-national and there may be occasions when US spelling has been used.



Public Domain: For information about images in the Public Domain please refer to the following websites:

The Open Door Team supports Open Education Resources. Its our way of giving back.

Every attempt has been made to ask permission to use the illustrations that are not in the public domain and which are not our own work. Thank you to all those who agreed to our requests.


Privacy Policy for saburchill.com

The privacy of our visitors to saburchill.com is important to us.

At saburchill.com, we recognize that privacy of your personal information is important. Here is information on what types of personal information that could be collected when you use and visit saburchill.com.

Cookies and Web Beacons

The Open Door Web Site has signed up to Custom Search Google AdSense. If you find any of the ads inappropriate then please contact the webmaster (webmaster(at)knockonthedoor.com) giving the full URL of the ad in question.

Some of these advertisers may use technology such as cookies and web beacons when they advertise on our site, which will also send these advertisers (such as Google through the Custom Search Google AdSense program) information including your IP address, your ISP , the browser you used to visit our site, and in some cases, whether you have Flash installed. This is generally used for geotargeting purposes (showing New York real estate ads to someone in New York, for example) or showing certain ads based on specific sites visited (such as showing cooking ads to someone who frequents cooking sites).

You can chose to disable or selectively turn off our cookies or third-party cookies in your browser settings, or by managing preferences in programs such as Norton Internet Security. However, this can affect how you are able to interact with our site as well as other websites.

AdSense Privacy Policy Provided by JenSense

Google and the DoubleClick DART cookie

Google, as a third party vendor, uses cookies to serve ads on saburchill.com. Google's use of the DART cookie enables it to serve ads to saburchill.com users based on their visit to saburchill.com and other sites on the Internet. Users may opt out of the use of the DART cookie by visiting the Google ad and content network privacy policy.

Google Analytics

Google Analytics mainly uses first-party cookies to report on user interactions on Google Analytics customers' websites. These cookies are used to store non-personally identifiable information. Browsers do not share first-party cookies across domains.

About the Open Door Web Site

Custom Search

If you come across any broken link then please inform the webmaster. Please send the URL so that the problem can be fixed quickly.


Statistics 2019

In 2020 the Open Door Web Site welcomed 408,000 visitors from 217 countries and territories.


About the Open Door Team

We are all qualified and experienced teachers and the aim of this web site is to make our original work available for both students and teachers world-wide.


Biology: Paul Billiet, Shirley Burchill, Alan Damon, Sharon Fenton and Deborah James.

Chemistry: Shirley Burchill

Physics: David Hoult

Physical Science: Teresa Brown and Lin Noan

Electronics: David Hoult

History: Nicholas Bunch, Shirley Burchill, Richard Gale, Nigel Hughes, Chris Green, Mathew Hill, Antony McDermott, Peter Price, Keith Woodall and Ann Pulsford.

Learning French: Huguette Zahler

Study Skills: Shirley Burchill, Claire Annie Faure, Barbara Ginsbach, Judith Stanwell and Jennifer Elliot.

Artist's Gallery: Rebecca Vincenzi


The Open Door Web Site is dedicated to Sharon Fenton, John Hembury, David Fuller, Nigel Hughes and Keith Woodall.




The Open Door Web Site will accept suitable adverts.

The image should be 72 dpi and no more than 800 pixels x 50 pixels. The cost for one banner advert on a page of your choice (excluding the Homepage) for a period of one year is £200. If you are interested contact webmaster(at)knockonthedoor.com

Banner Ad

Note: The sponsored URL linked to the image will open in a new window.



Sponsored Pages

Any individual, family, school or another appropriate organisation can sponsor a page on the Open Door Web Site. To sponsor a page for a period of one year costs £20. Your name (or the name of the organisation) will appear on the right hand side of the page.

Sponsored page



Not-for-profit use of Open Door Web Site images

Any student has permission to use any of the Open Door Website original images in his/her assignments. This includes word processing, PowerPoint presentations and web sites. The ODWS team only asks that you credit the image and link back to the Open Door Web Site (© ODWS www.saburchill.com)

All of the images copyrighted to the ODWS may be used for general not-for-profit publication with prior permission from the ODWS webmaster. This includes printed material, websites and PPT presentations. The ODWS team asks that you credit the image and link back to the Open Door Web Site (© ODWS www.saburchill.com)


For-profit use of Open Door Web Site images

All original ODWS images are available for purchase for one-time, non-exclusive electronic or conventional print use. This includes internet, multimedia and paper publications. The cost is £150 per image for a printed publication and £50 per image for use on a profit-making website or presentation. Once payment has been made the purchaser will receive a email asking for the exact URL giving the location of the image purchased. Once this information has been received, the ODWS will send a 300dpi copy of the purchased image.


The Open Door Web Site texts may NOT be used for

  • general publication in print

  • any website or other printed source involving financial gain


Help by Donating the Open Door Web Site

The Open Door Web Site is non-profit making. Your donations help towards the cost of maintaining this free service on-line.



If you have any questions or problems concerning this web site, please contact webmaster(at)knockonthedoor.com








© The Open Door Team 2021
Any questions or problems regarding this site should be addressed to the webmaster


Hosted By
Web Hosting by HostCentric