He began teaching at Crown Woods School (ILEA), in Eltham, London from 1982-1988. His responsibilities included being 2nd in charge of Chemistry and in charge of less able science. In 1988 he moved to Rednock School, Dursley, Gloucestershire as Head of Chemistry and was the Science College Director responsible for working with the community and extracurricular science activities for his students. Tim also taught at Mackay North SHS, Queensland, Australia as a seconded teacher of Chemistry. Tim holds an Open University MSc in Science 1999-2003 (part time) and is also a marker and item writer for a number of examination boards.

Chemistry Outreach and Education

Shallcross, DE, Harrison, TG, Obey, TM, Croker, SJ & Norman, NC, 2013, ‘Outreach within the Bristol ChemLabS CETL (Centre for Excellence in Teaching and Learning)’. Higher Education Studies , vol 3., pp. 39-49 Shallcross, DE, Harrison, TG, Rivett, AC & Tuah, J, 2012, ‘Climate Change: Outreaching to School Students and Teachers’. in: WY Chen (eds) Handbook of Climate Change Mitigation. Springer US, pp. 2029-2075