I have developed a project that I run with Y7 and deliver as part of their Science timetable. It comes under the science skills part of the curriculum. It touches on all the FOSIL stages and I have produced a workbook. It should be on the FOSIL website in the near future, but if you want to know more, please contact me on [email protected]r.com.
How interesting! I just did a random Google search for each of the classmarks you gave and they both came up with results from the Institute of Classical Studies Library at the Joint Library of the Hellenic and Roman Societies. I therefore searched for that and here is some information for you http://w01.icslib.wf.ulcc.ac.uk/about-collection.htm
If you scroll down you will find a paragraph all about their classification system! I hope that helps.