Artist Oscar Murillo goes back to school with canvas project

Turner prize-winner’s show Frequencies brings together drawings and writing by children from around the worldFor a long time it was endless One Direction scrawls. Then it was Harry Styles, and then it was neither, but all along there have been a lot of football references, a lot of Superman “S” signs and a lot of cryptic messages that mean nothing to the casual eye but everything to those who wrote them.The inner lives, interests and obsessions of more than 100,000 school child