You might have seen the item recently in the Oxford Mail about making mosaics at Cheney School.
http://www.oxfordmail.co.uk/news/11045769.Headington_pupils____school_mosaic_inspired_by_Romans/
This work is being led by local Headington artist Claire Goodall. You'll be able to see more of Claire's work at various Headington and Marston Artweeks events, and they are also on show at the WellBeing Clinic on Windmill Road in Headington.