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RT@SpringerEdu: Young children reasoning about symmetry in a dynamic geometry environment http://t.co/hVCWd9SDa0” @dcsymons :-)
RT@SpringerEdu: Young children reasoning about symmetry in a dynamic geometry environment http://t.co/hVCWd9SDa0” @dcsymons :-)
Young children reasoning about symmetry in a dynamic geometry environment http://t.co/E9FJ21wsN6