Tweet 27/05/2014 08:56 PM RT @phywand: SPT supporters materials links now on the TalkPhysics group. #piper14 0 0 2014 27/05/2014
Tweet 22/03/2014 04:56 PM RT @B_Ickringill: Simple ideas are the best. No more pupils holding mirrors. #piper14 0 0 2014 22/03/2014
