Vol. 25 Num. 1 (2005) Dick Tahta Teaching mathematics - an editorial2 Ole Skovsmose Foregrounds and politics of learning obstacles4 Razia Fakir Mohammad Issues of perceiving equality in a co-learning partnership in Pakistani schools11 Krista Bradford , Tony Brown Ceci n'est pas un "circle"16 Richard Barwell , Mamokgethi Setati Multilingualism in mathematics education: a conversation20 Laurinda Brown Communication: From the editor23 Chris Breen Opening the space of possibility - for myself (and others?)24 Sandy Dawson Communication: Ideas reinforced - ideas seen in a new way - ideas to be used28 Christopher Danielson Perimeter in the Curriculum30 Keith Weber , Laura Alcock Using warranted implications to understand and validate proofs34 Tony Brown Shifting psychological perspectives on the learning and teaching of mathematics39 Amy Hackenberg A model of mathematical learning and caring relations45