Spike@School v4.0 Using string and chalk the students were challenged to draw interlinking circles on the concrete. http://www.stpeterscatholic.school.nz/219/image_galleries/13-maths-week-2009/categories/14-crop-circles.rss en-nz http://www.stpeterscatholic.school.nz/files/81f112fdc51c9392/image_gallery_category_image/images/212/large/DSC00629_2.jpg http://www.stpeterscatholic.school.nz/files/81f112fdc51c9392/image_gallery_category_image/images/213/large/DSC00630_2.jpg http://www.stpeterscatholic.school.nz/files/81f112fdc51c9392/image_gallery_category_image/images/214/large/DSC00631_2.jpg http://www.stpeterscatholic.school.nz/files/81f112fdc51c9392/image_gallery_category_image/images/215/large/DSC00646_2.jpg http://www.stpeterscatholic.school.nz/files/81f112fdc51c9392/image_gallery_category_image/images/216/large/DSC00647_2.jpg