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About Grade Gorilla

Grade Gorilla is a recently registered Hong Kong Limited Company. (Company Registry 2931259).
We are a group of UK teachers currently based in Hong Kong who have been working in international schools.

Registered Office Address:
2310 Dominion Centre
43-59 Queen's Road East
Hong Kong
+852 55657072

Grade Gorilla has been operating since 2009 as a loss-making operation. We run two sites:

  • : currently completely free for schools.
  • : We charge for access to our texbooks to invest in developing the sites.

Personnel Involved:

  • Jon Gilchrist : Founder / Owner / Physics Content / Database manager (registered teacher in UK and HK)
  • Carol Boag : Chemistry Content (Registered teacher in UK and HK)
  • Su Cowland : Biology Content (Registered teacher in UK and HK)
  • Al Chalabi : Business Adviser

If you wish to request any more information as part of our GDPR compliance, update or delete your personal information, or any other issues, please contact us at