google: Ontario Curriculum – Mathematics: Data Management and Probabilit, grade 1 http://www.google.ca/url?sa=t&rct=j&q=ontario%20curriculum%20-%20mathematics%20data%20management%20and%20probability%20grade%201%20&source=web&cd=2&ved=0CDMQFjAB&url=http%3A%2F%2Fwww.edu.gov.on.ca%2Feng%2Fcurriculum%2Felementary%2Fmath18curr.pdf&ei=fakbUcrrMKKkyQHdhYHQCQ&usg=AFQjCNE3waf3JQpGBOgdjuewob7vcsh4-A&bvm=bv.42261806,d.aWc&cad=rja