RT @doc_kristy: OCR have engaged with chem ed research and my J.Chem.Ed. paper is now a GCSE activity :) ocr.org.uk/covalentmodell…
RT @doc_kristy: OCR have engaged with chem ed research and my J.Chem.Ed. paper is now a GCSE activity :) ocr.org.uk/covalentmodell…